9 replies

LLM request rejected: tools.21.custom.input_schema: JSON schema is invalid.

✅Solved

Ever since updating to 2026.2.15, I cannot get a single LLM response back from google-antigravity/claude-opus-4-6-thinking.

LLM request rejected: tools.21.custom.input_schema: JSON schema is invalid. It must match JSON Schema draft 2020-12

LLM request rejected: tools.21.custom.input_schema: JSON schema is invalid. It must match JSON Schema draft 2020-12

Solution

Yep — if tool #21 is

image

image

, the quickest way to get responses back is to stop advertising the
image
image
tool to

google-antigravity

google-antigravity

(Anthropic rejects the whole request if any tool schema fails validation).

Add this to your

openclaw.json

openclaw.json

{
  tools: {
    byProvider: {
      "google-antigravity": { deny: ["image"] }
      // or even narrower:
      // "google-antigravity/claude-opus-4-6-thinking": { deny: ["image"] }
    }
  }
}

{
  tools: {
    byProvider: {
      "google-antigravity": { deny: ["image"] }
      // or even narrower:
      // "google-antigravity/claude-opus-4-6-thinking": { deny: ["image"] }
    }
  }
}

Then restart the gateway and retry.

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LLM request rejected: tools.21.custom.input_schema: JSON schema is invalid.

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