fix: Apply strict JSON schema validation in FunctionTool constructor #1041
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Summary
Fixes an issue where directly created
FunctionTool
objects fail with OpenAI's Responses API due to missingadditionalProperties: false
in the JSON schema, while the@function_tool
decorator works correctly.Problem
The documentation example for creating
FunctionTool
objects directly fails with:This creates an inconsistency between
FunctionTool
and@function_tool
behavior, both of which havestrict_json_schema=True
by default.Solution
__post_init__
method toFunctionTool
dataclassensure_strict_json_schema()
whenstrict_json_schema=True
@function_tool
decoratorTesting
The fix can be verified by running the reproduction case from the issue: