fix(telemetry): histogram buckets from OTel standard to MCP standards by AjmeraParth132 · Pull Request #2729 · googleapis/mcp-toolbox

AjmeraParth132 · 2026-03-12T19:49:09Z

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

…m Conv Standard

gemini-code-assist · 2026-03-12T19:49:21Z

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.

Activity

The author reviewed the CONTRIBUTING.md guide.
An issue (Enhance Telemetry for Toolbox Servers #2222) was opened prior to this change.
Tests and linter checks have passed.
Code coverage was maintained.

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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.

internal/telemetry/telemetry.go

AjmeraParth132 · 2026-03-12T21:51:45Z

done @Yuan325

Yuan325

Thank you!! @AjmeraParth132

Yuan325 · 2026-03-12T23:44:25Z

/gcbrun

🤖 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>

🤖 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

🤖 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

🤖 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>

…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>

🤖 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>

fix(telemetry): moving histogram buckets from OTel standard to MCP Se…

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AjmeraParth132 requested a review from a team as a code owner March 12, 2026 19:49

blunderbuss-gcf bot assigned Yuan325 Mar 12, 2026

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AjmeraParth132 added 2 commits March 12, 2026 14:44

fix(telemetry): gemini feedbacks

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

Merge branch 'main' into fix/histogram_buckets

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Yuan325 enabled auto-merge (squash) March 12, 2026 23:45

Yuan325 merged commit 87cd4a0 into googleapis:main Mar 13, 2026
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chore(main): release 0.29.0 #2608

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mcp-toolbox 0.29.0 Homebrew/homebrew-core#272217

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

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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