fix(code): render MCP tool errors and drop empty-string optional params - #3624
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Two small fixes for `dcode` tool failures. When an MCP tool raised a `ToolException` server-side, the UI surfaced `Agent error: {'error': 'ToolException', 'message': 'An internal error occurred'}` as a raw Python dict repr — the redacted-payload shape that `langgraph_api` emits for non-allowlisted exceptions. Separately, Slack's `slack_search_public_and_private` (and similar ID-shaped MCP params) rejected `context_channel_id=""` with `"value is not a channel ID"` whenever the model filled an optional string param with `""` instead of omitting it.
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> [!CAUTION] > Merging this PR will automatically publish to **PyPI** and create a **GitHub release**. For the full release process, see [`.github/RELEASING.md`](https://github.com/langchain-ai/deepagents/blob/main/.github/RELEASING.md). --- _Everything below this line will be the GitHub release body._ --- ## [0.1.7](deepagents-code==0.1.6...deepagents-code==0.1.7) (2026-05-30) ### Features * Add toggleable message timestamp footers ([#3662](#3662)) ([977e110](977e110)) ### Bug Fixes * Fix zero tool MCP server rendering ([#3649](#3649)) ([7e7a567](7e7a567)) * Centralize debug logging setup to package root ([#3650](#3650)) ([5145ed1](5145ed1)) * Char-truncate execute tool preview output ([#3627](#3627)) ([bb276e2](bb276e2)) * Handle stale slash-command `Enter` before completion popup renders ([#3647](#3647)) ([9a28742](9a28742)) * Keep chat input focused when clicking a message ([#3655](#3655)) ([daf6571](daf6571)) * Mention `Ctrl+R` in MCP reconnect toast ([#3622](#3622)) ([3b4b086](3b4b086)) * Prevent duplicate-id crash on MCP reconnect and clipboard `NoScreen` ([#3632](#3632)) ([6b9a3c0](6b9a3c0)) * Reconstruct message counts for `DeltaChannel` threads from writes table ([#3668](#3668)) ([27e1940](27e1940)) * Render MCP tool errors and drop empty-string optional params ([#3624](#3624)) ([fdf3db4](fdf3db4)) * Respect line width in tool output previews ([#3646](#3646)) ([ba1ad2d](ba1ad2d)) * Restore resumed thread model ([#3651](#3651)) ([550a8ab](550a8ab)) * Tool spinner, result formatting, and expand-hint fixes ([#3661](#3661)) ([54485a3](54485a3)) --- _Everything above this line will be the GitHub release body._ --- > [!NOTE] > A **New Contributors** section is appended to the GitHub release notes automatically at publish time (see [Release Pipeline](https://github.com/langchain-ai/deepagents/blob/main/.github/RELEASING.md#release-pipeline), step 2). --------- Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Mason Daugherty <mason@langchain.dev> Co-authored-by: Mason Daugherty <github@mdrxy.com>
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…ms (langchain-ai#3624) Two small fixes for `dcode` tool failures. When an MCP tool raised a `ToolException` server-side, the UI surfaced `Agent error: {'error': 'ToolException', 'message': 'An internal error occurred'}` as a raw Python dict repr — the redacted-payload shape that `langgraph_api` emits for non-allowlisted exceptions. Separately, Slack's `slack_search_public_and_private` (and similar ID-shaped MCP params) rejected `context_channel_id=""` with `"value is not a channel ID"` whenever the model filled an optional string param with `""` instead of omitting it.
Marcelo5444
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Jul 30, 2026
> [!CAUTION] > Merging this PR will automatically publish to **PyPI** and create a **GitHub release**. For the full release process, see [`.github/RELEASING.md`](https://github.com/langchain-ai/deepagents/blob/main/.github/RELEASING.md). --- _Everything below this line will be the GitHub release body._ --- ## [0.1.7](langchain-ai/deepagents@deepagents-code==0.1.6...deepagents-code==0.1.7) (2026-05-30) ### Features * Add toggleable message timestamp footers ([langchain-ai#3662](langchain-ai#3662)) ([977e110](langchain-ai@977e110)) ### Bug Fixes * Fix zero tool MCP server rendering ([langchain-ai#3649](langchain-ai#3649)) ([7e7a567](langchain-ai@7e7a567)) * Centralize debug logging setup to package root ([langchain-ai#3650](langchain-ai#3650)) ([5145ed1](langchain-ai@5145ed1)) * Char-truncate execute tool preview output ([langchain-ai#3627](langchain-ai#3627)) ([bb276e2](langchain-ai@bb276e2)) * Handle stale slash-command `Enter` before completion popup renders ([langchain-ai#3647](langchain-ai#3647)) ([9a28742](langchain-ai@9a28742)) * Keep chat input focused when clicking a message ([langchain-ai#3655](langchain-ai#3655)) ([daf6571](langchain-ai@daf6571)) * Mention `Ctrl+R` in MCP reconnect toast ([langchain-ai#3622](langchain-ai#3622)) ([3b4b086](langchain-ai@3b4b086)) * Prevent duplicate-id crash on MCP reconnect and clipboard `NoScreen` ([langchain-ai#3632](langchain-ai#3632)) ([6b9a3c0](langchain-ai@6b9a3c0)) * Reconstruct message counts for `DeltaChannel` threads from writes table ([langchain-ai#3668](langchain-ai#3668)) ([27e1940](langchain-ai@27e1940)) * Render MCP tool errors and drop empty-string optional params ([langchain-ai#3624](langchain-ai#3624)) ([fdf3db4](langchain-ai@fdf3db4)) * Respect line width in tool output previews ([langchain-ai#3646](langchain-ai#3646)) ([ba1ad2d](langchain-ai@ba1ad2d)) * Restore resumed thread model ([langchain-ai#3651](langchain-ai#3651)) ([550a8ab](langchain-ai@550a8ab)) * Tool spinner, result formatting, and expand-hint fixes ([langchain-ai#3661](langchain-ai#3661)) ([54485a3](langchain-ai@54485a3)) --- _Everything above this line will be the GitHub release body._ --- > [!NOTE] > A **New Contributors** section is appended to the GitHub release notes automatically at publish time (see [Release Pipeline](https://github.com/langchain-ai/deepagents/blob/main/.github/RELEASING.md#release-pipeline), step 2). --------- Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com> Co-authored-by: Mason Daugherty <mason@langchain.dev> Co-authored-by: Mason Daugherty <github@mdrxy.com>
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Two small fixes for
dcodetool failures. When an MCP tool raised aToolExceptionserver-side, the UI surfacedAgent error: {'error': 'ToolException', 'message': 'An internal error occurred'}as a raw Python dict repr — the redacted-payload shape thatlanggraph_apiemits for non-allowlisted exceptions. Separately, Slack'sslack_search_public_and_private(and similar ID-shaped MCP params) rejectedcontext_channel_id=""with"value is not a channel ID"whenever the model filled an optional string param with""instead of omitting it.