[Bug] Anthropic API Error: Tool input_schema does not support oneOf/allOf/anyOf at top level

[Sukheil-Ganeev]

Bug Description
API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"tools.9.custom.input_schema: input_schema does not support oneOf,
allOf, or anyOf at the top level"},"request_id":"req_011CZUdgXdB8YJ1DV85aKywd"} issue

Environment Info

• Platform: win32
• Terminal: windows-terminal
• Version: 2.1.86
• Feedback ID: 3adeee52-073e-4b77-aa9a-b86956139e38

Errors

[{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at vYH (B:/~BUN/root/src/entrypoints/cli.js:1876:37436)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-28T01:05:54.248Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at vYH (B:/~BUN/root/src/entrypoints/cli.js:1876:37436)\n    at async Z (B:/~BUN/root/src/entrypoints/cli.js:5883:10286)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-28T01:05:55.074Z"},{"error":"Error: Plugin MCP server error - mcp-config-invalid: MCP server github invalid: Missing environment variables: GITHUB_PERSONAL_ACCESS_TOKEN\n    at vYH (B:/~BUN/root/src/entrypoints/cli.js:1876:37436)\n    at async T (B:/~BUN/root/src/entrypoints/cli.js:5883:11056)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-28T01:05:55.076Z"},{"error":"MaxFileReadTokenExceededError: File content (16489 tokens) exceeds maximum allowed tokens (10000). Use offset and limit parameters to read specific portions of the file, or search for specific content instead of reading the whole file.\n    at J1_ (B:/~BUN/root/src/entrypoints/cli.js:4337:5251)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-28T01:06:32.668Z"},{"error":"MaxFileReadTokenExceededError: File content (15333 tokens) exceeds maximum allowed tokens (10000). Use offset and limit parameters to read specific portions of the file, or search for specific content instead of reading the whole file.\n    at J1_ (B:/~BUN/root/src/entrypoints/cli.js:4337:5251)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-28T01:06:51.617Z"},{"error":"MaxFileReadTokenExceededError: File content (10452 tokens) exceeds maximum allowed tokens (10000). Use offset and limit parameters to read specific portions of the file, or search for specific content instead of reading the whole file.\n    at J1_ (B:/~BUN/root/src/entrypoints/cli.js:4337:5251)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-28T01:06:56.089Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"tools.21.custom.input_schema: input_schema does not support oneOf, allOf, or anyOf at the top level\"},\"request_id\":\"req_011CZUbQ3qAVMG2YZhbbpi1u\"}\n    at generate (B:/~BUN/root/src/entrypoints/cli.js:11:50727)\n    at makeRequest (B:/~BUN/root/src/entrypoints/cli.js:50:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-28T01:15:48.161Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"tools.21.custom.input_schema: input_schema does not support oneOf, allOf, or anyOf at the top level\"},\"request_id\":\"req_011CZUbQPNevpQvU6ucVEj6v\"}\n    at generate (B:/~BUN/root/src/entrypoints/cli.js:11:50727)\n    at makeRequest (B:/~BUN/root/src/entrypoints/cli.js:50:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-28T01:15:52.576Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"tools.9.custom.input_schema: input_schema does not support oneOf, allOf, or anyOf at the top level\"},\"request_id\":\"req_011CZUdZnZQRs53ATXRyDCBB\"}\n    at generate (B:/~BUN/root/src/entrypoints/cli.js:11:50727)\n    at makeRequest (B:/~BUN/root/src/entrypoints/cli.js:50:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-28T01:44:13.607Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"tools.9.custom.input_schema: input_schema does not support oneOf, allOf, or anyOf at the top level\"},\"request_id\":\"req_011CZUdgXdB8YJ1DV85aKywd\"}\n    at generate (B:/~BUN/root/src/entrypoints/cli.js:11:50727)\n    at makeRequest (B:/~BUN/root/src/entrypoints/cli.js:50:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-03-28T01:45:45.045Z"}]

[github-actions]

Found 3 possible duplicate issues:

1. [Bug] Subagent initialization or communication failure #40074
2. [Bug] Subagent execution or configuration issue #40063
3. [BUG] tools.26 schema error (oneOf/allOf/anyOf) in v2.1.63 #30212

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[github-actions]

This issue has been automatically closed as a duplicate of #40074.

If this is incorrect, please re-open this issue or create a new one.

🤖 Generated with Claude Code

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.