add Tool.outputSchema and CallToolResult.structuredContent #685
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…ly need an opt out for conversion to automatic conversion to DataContent
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Tagging @bhosmer-ant I took a pass refactoring my previous merge request to this repo to support modelcontextprotocol/modelcontextprotocol#371 there's definitely some rough edges happy to discuss potential improvments. |
davemssavage
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May 17, 2025
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| schema_func: Callable[..., dict[str, Any] | None] | None = None, |
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This is rather clunky, however I could think of no other way to maintain backwards compatibility with current python sdk that just assumes the function returns the result and not a protocol result as per the typescript version of this sdk which allows for a slightly cleaner implementation
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Enable tool to return structured content and output schema.
Motivation and Context
As per discussion in modelcontextprotocol/modelcontextprotocol#371 there are use cases where being able to know the schema of a tool is useful prior to calling it. This patch implements the behaviour specified.
In addition it allows for an extensible validation mechanism to be introduced on the client side. The default behaviour is to check the response conforms to the schema that is cached by the client but leaves the door open to other validation options and different caching techniques.
How Has This Been Tested?
Local unit testing only so far, some testing with deployed server locally
Breaking Changes
None
Types of changes
Checklist
Additional context
Updates to documentation will be required if this patch is approved