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Gemini models fail with 400 for any MCP tool whose array items has a union type (e.g. ["object","null"]); GPT/Claude unaffected #7389

Gemini models fail with 400 for any MCP tool whose array items has a union type (e.g. ["object","null"]); GPT/Claude unaffected

Gemini models fail with 400 for any MCP tool whose array items has a union type (e.g. ["object","null"]); GPT/Claude unaffected #7389