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fix(telemetry): histogram buckets from OTel standard to MCP standards#2729

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Yuan325 merged 4 commits intogoogleapis:mainfrom
AjmeraParth132:fix/histogram_buckets
Mar 13, 2026
Merged

fix(telemetry): histogram buckets from OTel standard to MCP standards#2729
Yuan325 merged 4 commits intogoogleapis:mainfrom
AjmeraParth132:fix/histogram_buckets

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@AjmeraParth132 AjmeraParth132 commented Mar 12, 2026

Description

Currently the Histograms for Telemetry Metrics are defaulted to OTel Standard ExplicitBucketBoundaries. These metrics SHOULD be specified with ExplicitBucketBoundaries of [ 0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, 30, 60, 120, 300 ].

PR Checklist

  • Make sure you reviewed
    CONTRIBUTING.md
  • Make sure to open an issue as a
    bug/issue
    before writing your code! That way we can discuss the change, evaluate
    designs, and agree on the general idea
  • Ensure the tests and linter pass
  • Code coverage does not decrease (if any source code was changed)
  • Appropriate docs were updated (if necessary)
  • Make sure to add ! if this involve a breaking change

🛠️ Fixes #2222

@AjmeraParth132 AjmeraParth132 requested a review from a team as a code owner March 12, 2026 19:49
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gemini-code-assist bot commented Mar 12, 2026

Summary of Changes

Hello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request standardizes the histogram bucket boundaries used for various duration metrics within the telemetry system. By applying a consistent set of explicit buckets derived from OpenTelemetry recommendations, the changes ensure that collected duration data is more uniformly categorized, facilitating better analysis and monitoring across different operations and sessions.

Highlights

  • Telemetry Histogram Buckets: Configured custom explicit bucket boundaries for duration metrics (mcp.server.operation.duration, mcp.server.session.duration, toolbox.tool.execution.duration) to align with OpenTelemetry semantic conventions and MCP standards.
  • Standardization: Adopted a standardized set of duration buckets ([0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, 30, 60, 120, 300]) for improved consistency and comparability of telemetry data.
Changelog
  • internal/telemetry/telemetry.go
    • Configured custom explicit bucket boundaries for duration histograms to align with OpenTelemetry standards.
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Code Review

This pull request correctly configures custom histogram bucket boundaries for duration-related telemetry metrics. This is a good improvement for metric consistency. I've added a couple of suggestions: one to refactor the view creation logic for better maintainability, and another to correct a misleading comment about the source of the bucket values.

Yuan325
Yuan325 requested changes Mar 12, 2026
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AjmeraParth132 commented Mar 12, 2026

done @Yuan325

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Thank you!! @AjmeraParth132

@Yuan325 Yuan325 added the release candidate Use label to signal PR should be included in the next release. label Mar 12, 2026
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Yuan325 commented Mar 12, 2026

/gcbrun

@Yuan325 Yuan325 added the tests: run Label to trigger Github Action tests. label Mar 12, 2026
@Yuan325 Yuan325 enabled auto-merge (squash) March 12, 2026 23:45
@Yuan325 Yuan325 merged commit 87cd4a0 into googleapis:main Mar 13, 2026
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@release-please release-please bot mentioned this pull request Mar 13, 2026
Merged
Yuan325 added a commit that referenced this pull request Mar 13, 2026
@release-please @Yuan325
chore(main): release 0.29.0 (#2608)
39832a0 
🤖 I have created a release *beep* *boop*
---


##
[0.29.0](v0.28.0...v0.29.0)
(2026-03-13)


### ⚠ BREAKING CHANGES

* **source/alloydb:** restructure prebuilt toolsets
([#2639](#2639))
* **source/spanner:** restructure prebuilt toolsets
([#2641](#2641))
* **source/dataplex:** restructure prebuilt toolsets
([#2640](#2640))
* **source/oss-db:** restructure prebuilt toolsets
([#2638](#2638))
* **source/cloudsql:** restructure prebuilt toolsets
([#2635](#2635))
* **source/bigquery:** restructure prebuilt toolsets
([#2637](#2637))
* **source/firestore:** restructure prebuilt toolsets
([#2636](#2636))
* telemetry metrics updates as per semantic convention
([#2566](#2566))

### Features

* Add user agent to embeddings generation
([#2572](#2572))
([287251a](287251a))
* **skill:** Attach user agent metadata for generated skill
([#2697](#2697))
([9598a6a](9598a6a))
* **skills:** Add additional-notes flag to generate skills command
([#2696](#2696))
([73bf962](73bf962))
* **skill:** Update skill generation logic
([#2646](#2646))
([c233eee](c233eee))
* **source/alloydb:** Restructure prebuilt toolsets
([#2639](#2639))
([5f3f063](5f3f063))
* **source/bigquery:** Restructure prebuilt toolsets
([#2637](#2637))
([dc984ba](dc984ba))
* **sources/bigquery:** Support custom oauth header name
([#2564](#2564))
([d3baf77](d3baf77))
* **source/cloudsql:** Restructure prebuilt toolsets
([#2635](#2635))
([99613dc](99613dc))
* **source/dataplex:** Restructure prebuilt toolsets
([#2640](#2640))
([acb9a80](acb9a80))
* **source/firestore:** Restructure prebuilt toolsets
([#2636](#2636))
([22ab7b9](22ab7b9))
* **source/oss-db:** Restructure prebuilt toolsets
([#2638](#2638))
([5196c6a](5196c6a))
* **source/spanner:** Restructure prebuilt toolsets
([#2641](#2641))
([ea2b698](ea2b698))
* Telemetry metrics updates as per semantic convention
([#2566](#2566))
([131d764](131d764))
* **tools/mongodb:** Add tool annotations to MongoDB tools for improved
LLM understanding
([#2219](#2219))
([b7a5f80](b7a5f80))
* **tools/serverless-spark:** Add get_session_template tool
([#2308](#2308))
([a136e16](a136e16))
* **tools/serverless-spark:** Add list/get sessions tools
([#2576](#2576))
([a554298](a554298))


### Bug Fixes

* Improve list locks integration test for postgres
([#2279](#2279))
([d9ebe5d](d9ebe5d))
* **mcp:** Guard nil SSE session lookup and return 400 for missing
session
([#2681](#2681))
([f66189f](f66189f))
* **oracle:** Update oracle-execute-sql tool interface to match source
signature
([#2627](#2627))
([81699a3](81699a3))
* Return AllParams for GetParameter() for tools with
templateParameter([#2734](#2734))
([bfd7ba6](bfd7ba6))
* **server/mcp:** Scope defer span.End inside loop iteration
([#2558](#2558))
([c88a62d](c88a62d)),
closes [#2549](#2549)
* **skill:** Fix env variable propagation
([#2645](#2645))
([5271368](5271368))
* **sources/looker:** Looker and looker-dev prebuilt tools should share
one source definition.
([#2620](#2620))
([df7f2fd](df7f2fd))
* **telemetry:** Histogram buckets from OTel standard to MCP standards
([#2729](#2729))
([87cd4a0](87cd4a0))
* **ui:** Remove module from script
([#2703](#2703))
([6943ab6](6943ab6))
* Update toolset attributes naming
([#2554](#2554))
([3d6ae4e](3d6ae4e))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com>
github-actions bot pushed a commit that referenced this pull request Mar 13, 2026
@Yuan325 @release-please
deploy: chore(main): release 0.29.0 (#2608)
76dd99a 
🤖 I have created a release *beep* *boop*
---

##
[0.29.0](v0.28.0...v0.29.0)
(2026-03-13)

### ⚠ BREAKING CHANGES

* **source/alloydb:** restructure prebuilt toolsets
([#2639](#2639))
* **source/spanner:** restructure prebuilt toolsets
([#2641](#2641))
* **source/dataplex:** restructure prebuilt toolsets
([#2640](#2640))
* **source/oss-db:** restructure prebuilt toolsets
([#2638](#2638))
* **source/cloudsql:** restructure prebuilt toolsets
([#2635](#2635))
* **source/bigquery:** restructure prebuilt toolsets
([#2637](#2637))
* **source/firestore:** restructure prebuilt toolsets
([#2636](#2636))
* telemetry metrics updates as per semantic convention
([#2566](#2566))

### Features

* Add user agent to embeddings generation
([#2572](#2572))
([287251a](287251a))
* **skill:** Attach user agent metadata for generated skill
([#2697](#2697))
([9598a6a](9598a6a))
* **skills:** Add additional-notes flag to generate skills command
([#2696](#2696))
([73bf962](73bf962))
* **skill:** Update skill generation logic
([#2646](#2646))
([c233eee](c233eee))
* **source/alloydb:** Restructure prebuilt toolsets
([#2639](#2639))
([5f3f063](5f3f063))
* **source/bigquery:** Restructure prebuilt toolsets
([#2637](#2637))
([dc984ba](dc984ba))
* **sources/bigquery:** Support custom oauth header name
([#2564](#2564))
([d3baf77](d3baf77))
* **source/cloudsql:** Restructure prebuilt toolsets
([#2635](#2635))
([99613dc](99613dc))
* **source/dataplex:** Restructure prebuilt toolsets
([#2640](#2640))
([acb9a80](acb9a80))
* **source/firestore:** Restructure prebuilt toolsets
([#2636](#2636))
([22ab7b9](22ab7b9))
* **source/oss-db:** Restructure prebuilt toolsets
([#2638](#2638))
([5196c6a](5196c6a))
* **source/spanner:** Restructure prebuilt toolsets
([#2641](#2641))
([ea2b698](ea2b698))
* Telemetry metrics updates as per semantic convention
([#2566](#2566))
([131d764](131d764))
* **tools/mongodb:** Add tool annotations to MongoDB tools for improved
LLM understanding
([#2219](#2219))
([b7a5f80](b7a5f80))
* **tools/serverless-spark:** Add get_session_template tool
([#2308](#2308))
([a136e16](a136e16))
* **tools/serverless-spark:** Add list/get sessions tools
([#2576](#2576))
([a554298](a554298))

### Bug Fixes

* Improve list locks integration test for postgres
([#2279](#2279))
([d9ebe5d](d9ebe5d))
* **mcp:** Guard nil SSE session lookup and return 400 for missing
session
([#2681](#2681))
([f66189f](f66189f))
* **oracle:** Update oracle-execute-sql tool interface to match source
signature
([#2627](#2627))
([81699a3](81699a3))
* Return AllParams for GetParameter() for tools with
templateParameter([#2734](#2734))
([bfd7ba6](bfd7ba6))
* **server/mcp:** Scope defer span.End inside loop iteration
([#2558](#2558))
([c88a62d](c88a62d)),
closes [#2549](#2549)
* **skill:** Fix env variable propagation
([#2645](#2645))
([5271368](5271368))
* **sources/looker:** Looker and looker-dev prebuilt tools should share
one source definition.
([#2620](#2620))
([df7f2fd](df7f2fd))
* **telemetry:** Histogram buckets from OTel standard to MCP standards
([#2729](#2729))
([87cd4a0](87cd4a0))
* **ui:** Remove module from script
([#2703](#2703))
([6943ab6](6943ab6))
* Update toolset attributes naming
([#2554](#2554))
([3d6ae4e](3d6ae4e))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com> 39832a0
github-actions bot pushed a commit to renovate-bot/googleapis-_-genai-toolbox that referenced this pull request Mar 13, 2026
@renovate-bot @release-please
deploy: chore(main): release 0.29.0 (googleapis#2608)
7bd96b9 
🤖 I have created a release *beep* *boop*
---

##
[0.29.0](googleapis/mcp-toolbox@v0.28.0...v0.29.0)
(2026-03-13)

### ⚠ BREAKING CHANGES

* **source/alloydb:** restructure prebuilt toolsets
([googleapis#2639](googleapis#2639))
* **source/spanner:** restructure prebuilt toolsets
([googleapis#2641](googleapis#2641))
* **source/dataplex:** restructure prebuilt toolsets
([googleapis#2640](googleapis#2640))
* **source/oss-db:** restructure prebuilt toolsets
([googleapis#2638](googleapis#2638))
* **source/cloudsql:** restructure prebuilt toolsets
([googleapis#2635](googleapis#2635))
* **source/bigquery:** restructure prebuilt toolsets
([googleapis#2637](googleapis#2637))
* **source/firestore:** restructure prebuilt toolsets
([googleapis#2636](googleapis#2636))
* telemetry metrics updates as per semantic convention
([googleapis#2566](googleapis#2566))

### Features

* Add user agent to embeddings generation
([googleapis#2572](googleapis#2572))
([287251a](googleapis@287251a))
* **skill:** Attach user agent metadata for generated skill
([googleapis#2697](googleapis#2697))
([9598a6a](googleapis@9598a6a))
* **skills:** Add additional-notes flag to generate skills command
([googleapis#2696](googleapis#2696))
([73bf962](googleapis@73bf962))
* **skill:** Update skill generation logic
([googleapis#2646](googleapis#2646))
([c233eee](googleapis@c233eee))
* **source/alloydb:** Restructure prebuilt toolsets
([googleapis#2639](googleapis#2639))
([5f3f063](googleapis@5f3f063))
* **source/bigquery:** Restructure prebuilt toolsets
([googleapis#2637](googleapis#2637))
([dc984ba](googleapis@dc984ba))
* **sources/bigquery:** Support custom oauth header name
([googleapis#2564](googleapis#2564))
([d3baf77](googleapis@d3baf77))
* **source/cloudsql:** Restructure prebuilt toolsets
([googleapis#2635](googleapis#2635))
([99613dc](googleapis@99613dc))
* **source/dataplex:** Restructure prebuilt toolsets
([googleapis#2640](googleapis#2640))
([acb9a80](googleapis@acb9a80))
* **source/firestore:** Restructure prebuilt toolsets
([googleapis#2636](googleapis#2636))
([22ab7b9](googleapis@22ab7b9))
* **source/oss-db:** Restructure prebuilt toolsets
([googleapis#2638](googleapis#2638))
([5196c6a](googleapis@5196c6a))
* **source/spanner:** Restructure prebuilt toolsets
([googleapis#2641](googleapis#2641))
([ea2b698](googleapis@ea2b698))
* Telemetry metrics updates as per semantic convention
([googleapis#2566](googleapis#2566))
([131d764](googleapis@131d764))
* **tools/mongodb:** Add tool annotations to MongoDB tools for improved
LLM understanding
([googleapis#2219](googleapis#2219))
([b7a5f80](googleapis@b7a5f80))
* **tools/serverless-spark:** Add get_session_template tool
([googleapis#2308](googleapis#2308))
([a136e16](googleapis@a136e16))
* **tools/serverless-spark:** Add list/get sessions tools
([googleapis#2576](googleapis#2576))
([a554298](googleapis@a554298))

### Bug Fixes

* Improve list locks integration test for postgres
([googleapis#2279](googleapis#2279))
([d9ebe5d](googleapis@d9ebe5d))
* **mcp:** Guard nil SSE session lookup and return 400 for missing
session
([googleapis#2681](googleapis#2681))
([f66189f](googleapis@f66189f))
* **oracle:** Update oracle-execute-sql tool interface to match source
signature
([googleapis#2627](googleapis#2627))
([81699a3](googleapis@81699a3))
* Return AllParams for GetParameter() for tools with
templateParameter([googleapis#2734](googleapis#2734))
([bfd7ba6](googleapis@bfd7ba6))
* **server/mcp:** Scope defer span.End inside loop iteration
([googleapis#2558](googleapis#2558))
([c88a62d](googleapis@c88a62d)),
closes [googleapis#2549](googleapis#2549)
* **skill:** Fix env variable propagation
([googleapis#2645](googleapis#2645))
([5271368](googleapis@5271368))
* **sources/looker:** Looker and looker-dev prebuilt tools should share
one source definition.
([googleapis#2620](googleapis#2620))
([df7f2fd](googleapis@df7f2fd))
* **telemetry:** Histogram buckets from OTel standard to MCP standards
([googleapis#2729](googleapis#2729))
([87cd4a0](googleapis@87cd4a0))
* **ui:** Remove module from script
([googleapis#2703](googleapis#2703))
([6943ab6](googleapis@6943ab6))
* Update toolset attributes naming
([googleapis#2554](googleapis#2554))
([3d6ae4e](googleapis@3d6ae4e))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com> 39832a0
github-actions bot pushed a commit to Jaleel-zhu/genai-toolbox that referenced this pull request Mar 13, 2026
@pull @release-please
deploy: chore(main): release 0.29.0 (googleapis#2608)
e658ef2 
🤖 I have created a release *beep* *boop*
---

##
[0.29.0](googleapis/mcp-toolbox@v0.28.0...v0.29.0)
(2026-03-13)

### ⚠ BREAKING CHANGES

* **source/alloydb:** restructure prebuilt toolsets
([googleapis#2639](googleapis#2639))
* **source/spanner:** restructure prebuilt toolsets
([googleapis#2641](googleapis#2641))
* **source/dataplex:** restructure prebuilt toolsets
([googleapis#2640](googleapis#2640))
* **source/oss-db:** restructure prebuilt toolsets
([googleapis#2638](googleapis#2638))
* **source/cloudsql:** restructure prebuilt toolsets
([googleapis#2635](googleapis#2635))
* **source/bigquery:** restructure prebuilt toolsets
([googleapis#2637](googleapis#2637))
* **source/firestore:** restructure prebuilt toolsets
([googleapis#2636](googleapis#2636))
* telemetry metrics updates as per semantic convention
([googleapis#2566](googleapis#2566))

### Features

* Add user agent to embeddings generation
([googleapis#2572](googleapis#2572))
([287251a](googleapis@287251a))
* **skill:** Attach user agent metadata for generated skill
([googleapis#2697](googleapis#2697))
([9598a6a](googleapis@9598a6a))
* **skills:** Add additional-notes flag to generate skills command
([googleapis#2696](googleapis#2696))
([73bf962](googleapis@73bf962))
* **skill:** Update skill generation logic
([googleapis#2646](googleapis#2646))
([c233eee](googleapis@c233eee))
* **source/alloydb:** Restructure prebuilt toolsets
([googleapis#2639](googleapis#2639))
([5f3f063](googleapis@5f3f063))
* **source/bigquery:** Restructure prebuilt toolsets
([googleapis#2637](googleapis#2637))
([dc984ba](googleapis@dc984ba))
* **sources/bigquery:** Support custom oauth header name
([googleapis#2564](googleapis#2564))
([d3baf77](googleapis@d3baf77))
* **source/cloudsql:** Restructure prebuilt toolsets
([googleapis#2635](googleapis#2635))
([99613dc](googleapis@99613dc))
* **source/dataplex:** Restructure prebuilt toolsets
([googleapis#2640](googleapis#2640))
([acb9a80](googleapis@acb9a80))
* **source/firestore:** Restructure prebuilt toolsets
([googleapis#2636](googleapis#2636))
([22ab7b9](googleapis@22ab7b9))
* **source/oss-db:** Restructure prebuilt toolsets
([googleapis#2638](googleapis#2638))
([5196c6a](googleapis@5196c6a))
* **source/spanner:** Restructure prebuilt toolsets
([googleapis#2641](googleapis#2641))
([ea2b698](googleapis@ea2b698))
* Telemetry metrics updates as per semantic convention
([googleapis#2566](googleapis#2566))
([131d764](googleapis@131d764))
* **tools/mongodb:** Add tool annotations to MongoDB tools for improved
LLM understanding
([googleapis#2219](googleapis#2219))
([b7a5f80](googleapis@b7a5f80))
* **tools/serverless-spark:** Add get_session_template tool
([googleapis#2308](googleapis#2308))
([a136e16](googleapis@a136e16))
* **tools/serverless-spark:** Add list/get sessions tools
([googleapis#2576](googleapis#2576))
([a554298](googleapis@a554298))

### Bug Fixes

* Improve list locks integration test for postgres
([googleapis#2279](googleapis#2279))
([d9ebe5d](googleapis@d9ebe5d))
* **mcp:** Guard nil SSE session lookup and return 400 for missing
session
([googleapis#2681](googleapis#2681))
([f66189f](googleapis@f66189f))
* **oracle:** Update oracle-execute-sql tool interface to match source
signature
([googleapis#2627](googleapis#2627))
([81699a3](googleapis@81699a3))
* Return AllParams for GetParameter() for tools with
templateParameter([googleapis#2734](googleapis#2734))
([bfd7ba6](googleapis@bfd7ba6))
* **server/mcp:** Scope defer span.End inside loop iteration
([googleapis#2558](googleapis#2558))
([c88a62d](googleapis@c88a62d)),
closes [googleapis#2549](googleapis#2549)
* **skill:** Fix env variable propagation
([googleapis#2645](googleapis#2645))
([5271368](googleapis@5271368))
* **sources/looker:** Looker and looker-dev prebuilt tools should share
one source definition.
([googleapis#2620](googleapis#2620))
([df7f2fd](googleapis@df7f2fd))
* **telemetry:** Histogram buckets from OTel standard to MCP standards
([googleapis#2729](googleapis#2729))
([87cd4a0](googleapis@87cd4a0))
* **ui:** Remove module from script
([googleapis#2703](googleapis#2703))
([6943ab6](googleapis@6943ab6))
* Update toolset attributes naming
([googleapis#2554](googleapis#2554))
([3d6ae4e](googleapis@3d6ae4e))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com> 39832a0
@BrewTestBot BrewTestBot mentioned this pull request Mar 13, 2026
Merged
NightStack15 added a commit to NightStack15/googleapis-_-genai-toolbox that referenced this pull request Mar 20, 2026
@NightStack15 @release-please @Yuan325
chore(main): release 0.29.0 (#2608)
8c0d6a0 
🤖 I have created a release *beep* *boop*
---


##
[0.29.0](googleapis/mcp-toolbox@v0.28.0...v0.29.0)
(2026-03-13)


### ⚠ BREAKING CHANGES

* **source/alloydb:** restructure prebuilt toolsets
([#2639](googleapis/mcp-toolbox#2639))
* **source/spanner:** restructure prebuilt toolsets
([#2641](googleapis/mcp-toolbox#2641))
* **source/dataplex:** restructure prebuilt toolsets
([#2640](googleapis/mcp-toolbox#2640))
* **source/oss-db:** restructure prebuilt toolsets
([#2638](googleapis/mcp-toolbox#2638))
* **source/cloudsql:** restructure prebuilt toolsets
([#2635](googleapis/mcp-toolbox#2635))
* **source/bigquery:** restructure prebuilt toolsets
([#2637](googleapis/mcp-toolbox#2637))
* **source/firestore:** restructure prebuilt toolsets
([#2636](googleapis/mcp-toolbox#2636))
* telemetry metrics updates as per semantic convention
([#2566](googleapis/mcp-toolbox#2566))

### Features

* Add user agent to embeddings generation
([#2572](googleapis/mcp-toolbox#2572))
([287251a](googleapis/mcp-toolbox@287251a))
* **skill:** Attach user agent metadata for generated skill
([#2697](googleapis/mcp-toolbox#2697))
([9598a6a](googleapis/mcp-toolbox@9598a6a))
* **skills:** Add additional-notes flag to generate skills command
([#2696](googleapis/mcp-toolbox#2696))
([73bf962](googleapis/mcp-toolbox@73bf962))
* **skill:** Update skill generation logic
([#2646](googleapis/mcp-toolbox#2646))
([c233eee](googleapis/mcp-toolbox@c233eee))
* **source/alloydb:** Restructure prebuilt toolsets
([#2639](googleapis/mcp-toolbox#2639))
([5f3f063](googleapis/mcp-toolbox@5f3f063))
* **source/bigquery:** Restructure prebuilt toolsets
([#2637](googleapis/mcp-toolbox#2637))
([dc984ba](googleapis/mcp-toolbox@dc984ba))
* **sources/bigquery:** Support custom oauth header name
([#2564](googleapis/mcp-toolbox#2564))
([d3baf77](googleapis/mcp-toolbox@d3baf77))
* **source/cloudsql:** Restructure prebuilt toolsets
([#2635](googleapis/mcp-toolbox#2635))
([99613dc](googleapis/mcp-toolbox@99613dc))
* **source/dataplex:** Restructure prebuilt toolsets
([#2640](googleapis/mcp-toolbox#2640))
([acb9a80](googleapis/mcp-toolbox@acb9a80))
* **source/firestore:** Restructure prebuilt toolsets
([#2636](googleapis/mcp-toolbox#2636))
([22ab7b9](googleapis/mcp-toolbox@22ab7b9))
* **source/oss-db:** Restructure prebuilt toolsets
([#2638](googleapis/mcp-toolbox#2638))
([5196c6a](googleapis/mcp-toolbox@5196c6a))
* **source/spanner:** Restructure prebuilt toolsets
([#2641](googleapis/mcp-toolbox#2641))
([ea2b698](googleapis/mcp-toolbox@ea2b698))
* Telemetry metrics updates as per semantic convention
([#2566](googleapis/mcp-toolbox#2566))
([131d764](googleapis/mcp-toolbox@131d764))
* **tools/mongodb:** Add tool annotations to MongoDB tools for improved
LLM understanding
([#2219](googleapis/mcp-toolbox#2219))
([b7a5f80](googleapis/mcp-toolbox@b7a5f80))
* **tools/serverless-spark:** Add get_session_template tool
([#2308](googleapis/mcp-toolbox#2308))
([a136e16](googleapis/mcp-toolbox@a136e16))
* **tools/serverless-spark:** Add list/get sessions tools
([#2576](googleapis/mcp-toolbox#2576))
([a554298](googleapis/mcp-toolbox@a554298))


### Bug Fixes

* Improve list locks integration test for postgres
([#2279](googleapis/mcp-toolbox#2279))
([d9ebe5d](googleapis/mcp-toolbox@d9ebe5d))
* **mcp:** Guard nil SSE session lookup and return 400 for missing
session
([#2681](googleapis/mcp-toolbox#2681))
([f66189f](googleapis/mcp-toolbox@f66189f))
* **oracle:** Update oracle-execute-sql tool interface to match source
signature
([#2627](googleapis/mcp-toolbox#2627))
([81699a3](googleapis/mcp-toolbox@81699a3))
* Return AllParams for GetParameter() for tools with
templateParameter([#2734](googleapis/mcp-toolbox#2734))
([bfd7ba6](googleapis/mcp-toolbox@bfd7ba6))
* **server/mcp:** Scope defer span.End inside loop iteration
([#2558](googleapis/mcp-toolbox#2558))
([c88a62d](googleapis/mcp-toolbox@c88a62d)),
closes [#2549](googleapis/mcp-toolbox#2549)
* **skill:** Fix env variable propagation
([#2645](googleapis/mcp-toolbox#2645))
([5271368](googleapis/mcp-toolbox@5271368))
* **sources/looker:** Looker and looker-dev prebuilt tools should share
one source definition.
([#2620](googleapis/mcp-toolbox#2620))
([df7f2fd](googleapis/mcp-toolbox@df7f2fd))
* **telemetry:** Histogram buckets from OTel standard to MCP standards
([#2729](googleapis/mcp-toolbox#2729))
([87cd4a0](googleapis/mcp-toolbox@87cd4a0))
* **ui:** Remove module from script
([#2703](googleapis/mcp-toolbox#2703))
([6943ab6](googleapis/mcp-toolbox@6943ab6))
* Update toolset attributes naming
([#2554](googleapis/mcp-toolbox#2554))
([3d6ae4e](googleapis/mcp-toolbox@3d6ae4e))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com>
NirajNandre pushed a commit to NirajNandre/genai-toolbox-fork that referenced this pull request Mar 24, 2026
@AjmeraParth132 @Yuan325 @NirajNandre
fix(telemetry): histogram buckets from OTel standard to MCP standards (…
3a1daf2 
…googleapis#2729)

## Description

> Currently the Histograms for Telemetry Metrics are defaulted to OTel
Standard ExplicitBucketBoundaries. These metrics SHOULD be specified
with
[ExplicitBucketBoundaries](https://github.com/open-telemetry/opentelemetry-specification/blob/v1.50.0/specification/metrics/api.md#instrument-advisory-parameters)
of [ 0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, 30, 60, 120, 300 ].

## PR Checklist

- [x] Make sure you reviewed

[CONTRIBUTING.md](https://github.com/googleapis/genai-toolbox/blob/main/CONTRIBUTING.md)
- [x] Make sure to open an issue as a

[bug/issue](https://github.com/googleapis/genai-toolbox/issues/new/choose)
  before writing your code! That way we can discuss the change, evaluate
  designs, and agree on the general idea
- [x] Ensure the tests and linter pass
- [x] Code coverage does not decrease (if any source code was changed)
- [ ] Appropriate docs were updated (if necessary)
- [ ] Make sure to add `!` if this involve a breaking change

🛠️ Fixes googleapis#2222

---------

Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com>
NirajNandre pushed a commit to NirajNandre/genai-toolbox-fork that referenced this pull request Mar 24, 2026
@release-please @Yuan325 @NirajNandre
chore(main): release 0.29.0 (googleapis#2608)
ae10114 
🤖 I have created a release *beep* *boop*
---


##
[0.29.0](googleapis/mcp-toolbox@v0.28.0...v0.29.0)
(2026-03-13)


### ⚠ BREAKING CHANGES

* **source/alloydb:** restructure prebuilt toolsets
([googleapis#2639](googleapis#2639))
* **source/spanner:** restructure prebuilt toolsets
([googleapis#2641](googleapis#2641))
* **source/dataplex:** restructure prebuilt toolsets
([googleapis#2640](googleapis#2640))
* **source/oss-db:** restructure prebuilt toolsets
([googleapis#2638](googleapis#2638))
* **source/cloudsql:** restructure prebuilt toolsets
([googleapis#2635](googleapis#2635))
* **source/bigquery:** restructure prebuilt toolsets
([googleapis#2637](googleapis#2637))
* **source/firestore:** restructure prebuilt toolsets
([googleapis#2636](googleapis#2636))
* telemetry metrics updates as per semantic convention
([googleapis#2566](googleapis#2566))

### Features

* Add user agent to embeddings generation
([googleapis#2572](googleapis#2572))
([287251a](googleapis@287251a))
* **skill:** Attach user agent metadata for generated skill
([googleapis#2697](googleapis#2697))
([9598a6a](googleapis@9598a6a))
* **skills:** Add additional-notes flag to generate skills command
([googleapis#2696](googleapis#2696))
([73bf962](googleapis@73bf962))
* **skill:** Update skill generation logic
([googleapis#2646](googleapis#2646))
([c233eee](googleapis@c233eee))
* **source/alloydb:** Restructure prebuilt toolsets
([googleapis#2639](googleapis#2639))
([5f3f063](googleapis@5f3f063))
* **source/bigquery:** Restructure prebuilt toolsets
([googleapis#2637](googleapis#2637))
([dc984ba](googleapis@dc984ba))
* **sources/bigquery:** Support custom oauth header name
([googleapis#2564](googleapis#2564))
([d3baf77](googleapis@d3baf77))
* **source/cloudsql:** Restructure prebuilt toolsets
([googleapis#2635](googleapis#2635))
([99613dc](googleapis@99613dc))
* **source/dataplex:** Restructure prebuilt toolsets
([googleapis#2640](googleapis#2640))
([acb9a80](googleapis@acb9a80))
* **source/firestore:** Restructure prebuilt toolsets
([googleapis#2636](googleapis#2636))
([22ab7b9](googleapis@22ab7b9))
* **source/oss-db:** Restructure prebuilt toolsets
([googleapis#2638](googleapis#2638))
([5196c6a](googleapis@5196c6a))
* **source/spanner:** Restructure prebuilt toolsets
([googleapis#2641](googleapis#2641))
([ea2b698](googleapis@ea2b698))
* Telemetry metrics updates as per semantic convention
([googleapis#2566](googleapis#2566))
([131d764](googleapis@131d764))
* **tools/mongodb:** Add tool annotations to MongoDB tools for improved
LLM understanding
([googleapis#2219](googleapis#2219))
([b7a5f80](googleapis@b7a5f80))
* **tools/serverless-spark:** Add get_session_template tool
([googleapis#2308](googleapis#2308))
([a136e16](googleapis@a136e16))
* **tools/serverless-spark:** Add list/get sessions tools
([googleapis#2576](googleapis#2576))
([a554298](googleapis@a554298))


### Bug Fixes

* Improve list locks integration test for postgres
([googleapis#2279](googleapis#2279))
([d9ebe5d](googleapis@d9ebe5d))
* **mcp:** Guard nil SSE session lookup and return 400 for missing
session
([googleapis#2681](googleapis#2681))
([f66189f](googleapis@f66189f))
* **oracle:** Update oracle-execute-sql tool interface to match source
signature
([googleapis#2627](googleapis#2627))
([81699a3](googleapis@81699a3))
* Return AllParams for GetParameter() for tools with
templateParameter([googleapis#2734](googleapis#2734))
([bfd7ba6](googleapis@bfd7ba6))
* **server/mcp:** Scope defer span.End inside loop iteration
([googleapis#2558](googleapis#2558))
([c88a62d](googleapis@c88a62d)),
closes [googleapis#2549](googleapis#2549)
* **skill:** Fix env variable propagation
([googleapis#2645](googleapis#2645))
([5271368](googleapis@5271368))
* **sources/looker:** Looker and looker-dev prebuilt tools should share
one source definition.
([googleapis#2620](googleapis#2620))
([df7f2fd](googleapis@df7f2fd))
* **telemetry:** Histogram buckets from OTel standard to MCP standards
([googleapis#2729](googleapis#2729))
([87cd4a0](googleapis@87cd4a0))
* **ui:** Remove module from script
([googleapis#2703](googleapis#2703))
([6943ab6](googleapis@6943ab6))
* Update toolset attributes naming
([googleapis#2554](googleapis#2554))
([3d6ae4e](googleapis@3d6ae4e))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

---------

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>
Co-authored-by: Yuan Teoh <45984206+Yuan325@users.noreply.github.com>
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@Yuan325 Yuan325 Yuan325 approved these changes

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Enhance Telemetry for Toolbox Servers

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@AjmeraParth132 @Yuan325