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737b46f032Validate accepted form-mode elicitation `content` against the `requestedSchema` on the server, rejecting mismatches with an `INVALID_PARAMS` error. fixes #895 <!-- Provide a brief summary of your changes --> ## Motivation and Context <!-- Why is this change needed? What problem does it solve? --> `createElicitation` returned accepted content to server code as-is. The specification's form-mode security guidance says "Servers SHOULD validate received data matches the requested schema" ([2025-11-25, Form Mode Security](https://modelcontextprotocol.io/specification/2025-11-25/client/elicitation#form-mode-security)). Comparable validation already exists in the TypeScript SDK's `elicitInput` and Python's `elicit_with_validation` helper. Details and design notes are in #895. ## How Has This Been Tested? <!-- Have you tested this in a real application? Which scenarios were tested? --> New unit tests for the validator and integration tests over an in-memory client–server pair. ## Breaking Changes <!-- Will users need to update their code or configurations? --> No API changes. Behavioral note: an accepted form-mode response that does not match the requested schema now fails `createElicitation` with `McpException` (`INVALID_PARAMS`) instead of being returned to the caller. ## Types of changes <!-- What types of changes does your code introduce? Put an `x` in all the boxes that apply: --> - [ ] Bug fix (non-breaking change which fixes an issue) - [x] New feature (non-breaking change which adds functionality) - [ ] Breaking change (fix or feature that would cause existing functionality to change) - [ ] Documentation update ## Checklist <!-- Go over all the following points, and put an `x` in all the boxes that apply. --> - [x] I have read the [MCP Documentation](https://modelcontextprotocol.io) - [x] My code follows the repository's style guidelines - [x] New and existing tests pass locally - [x] I have added appropriate error handling - [x] I have added or updated documentation as needed Co-authored-by: Pavel Gorgulov <devcrocod@gmail.com> |
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