A tool with a non-object outputSchema is served unchanged to 2025-11-25 clients
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Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 66/100
- Issue type
- Bug
- Clarity
- Mostly clear
- Activity status
- Active
- Tech stack
- typescript
- Domain
- api
Research direction
Find the legacy client listing and tool response handling, then check how they process outputSchema and structuredContent for revisions before 2025-11-25. Reproduce the case with an array output schema and array structured content, and compare it with the earlier object-only requirements. Done means legacy clients no longer receive tools or results they reject; the issue does not identify file paths or tests.
Written by the indexing model from the issue text.
Description
2026-07-28 allows any outputSchema and any JSON value in structuredContent; earlier revisions require outputSchema.type: 'object' and an object structuredContent. A tool registered with outputSchema: { type: 'array' } is listed with that schema to legacy clients and returns structuredContent: [1, 2], which their schema validation rejects. Such tools should be omitted from (or adapted for) the legacy listing.
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- Dominant language
- TypeScript
- Stars
- 58
- Forks
- 15
- Avg merge
- 1d 5h
- Merged PRs (30d)
- 57
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- Open a pull request that references the issue number.
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