Gemini: every request fails with HTTP 400 when a tool schema contains $ref / $defs / additionalProperties

📝 摘要

工具 schema 含 $ref/$defs 时 Gemini 请求报 HTTP 400

📄 正文节选

Summary When a session has any tool loaded whose `parameters` JSON Schema uses `$ref`, `$defs`, or `additionalProperties`, every request to a Google Gemini model fails with: ``` HTTP 400 {"error":{"code":400,"message":"Request contains an invalid argument.","status":"INVALID_ARGUMENT"}} ``` Because ……

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