tool_input_validationTier 1 · 70% confidence
ai-agents-tool-input-validatio-sporadic-400-error-from-bedrock-tools-3-custom-inp-74ed72a1
agent: ai_agents
When does this happen?
IF Sporadic 400 error from Bedrock: 'tools.3.custom.input_examples: Extra inputs are not permitted' when using Claude Code with LiteLLM.
How others solved it
THEN Ensure tool definitions do not include the 'input_examples' field. Either downgrade Claude Code to v2.0.36 (which does not send this field) or implement a custom LiteLLM middleware to strip unsupported nested fields from tool definitions before sending to Bedrock. The 'drop_params: true' setting only handles top-level parameters, not nested tool properties.
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