fix: validate and coerce function tool argument types#4664

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yuvrajangadsingh wants to merge 12 commits intogoogle:mainfrom

yuvrajangadsingh:fix/enforce-arg-types-4612

Commits on Mar 2, 2026

fix: validate and coerce function tool argument types (#4612)
yuvrajangadsingh
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refactor: narrow except clause and extract validation error helper
yuvrajangadsingh
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refactor: apply Gemini review round 2 feedback
yuvrajangadsingh
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style: use __name__ for cleaner type names in error messages
yuvrajangadsingh
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style: use deferred string formatting in logger.warning
yuvrajangadsingh
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refactor: hoist Optional None check before Pydantic branch
yuvrajangadsingh
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fix: handle Python 3.10+ union syntax (T | None) in Optional unwrap
yuvrajangadsingh
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refactor: let TypeAdapter handle all types uniformly, skip framework params
yuvrajangadsingh
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perf: cache TypeAdapter instances across tool invocations
yuvrajangadsingh
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refactor: remove manual Optional unwrap, TypeAdapter handles it natively
yuvrajangadsingh
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fix: handle unhashable types in TypeAdapter cache without skipping validation
yuvrajangadsingh
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refactor: split cache except into separate TypeError and KeyError handlers
yuvrajangadsingh
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