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Carry JSON Schema type for optional tool fields - #8248
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Ege (ege-arhan) wants to merge 1 commit into
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Ran into this while looking at #6848 — optional tool args like country: Optional[str] = None come out of BaseTool.schema without a top-level type, just anyOf. Some providers (Gemini in that report) reject the declaration because a property has no type field.
This just copies the non-null branch's type up when there's exactly one, so anyOf stays untouched and everything else renders the same as before.
Checked test_tools.py locally, 39 passed.