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Summary by cubic

Fixes undefined title errors and improves resilience when converting JSON Schema to Gemini function schemas. Prevents crashes on missing types and malformed parameters.

• Bug Fixes
  • Return TYPE_UNSPECIFIED when schema/type is missing or invalid.
  • Remove title mapping; only set description.
  • Detect object/array from properties/items; support type arrays and nullable unions.
  • Validate items/properties before converting; filter anyOf to valid objects.
  • Skip empty object parameters; safer parameter checks.

^{Written for commit cbbfa0c. Summary will update on new commits.}