Bedrock logs are not capturing trace info even when requests are blocked by the configured Guardrail.

Author: cds-codeCreated Sep 7, 2026Updated Sep 7, 2026

Labelsbug

I have enabled Bedrock Guardrails, but the expected trace data is missing from the Bedrock invocation logs upon a block intervention. The implementation looks something like this:

guardrail_env['ANTHROPIC_CUSTOM_HEADERS'] = (
                    f'X-Amzn-Bedrock-GuardrailIdentifier: {guardrail_id}\n'
                    f'X-Amzn-Bedrock-GuardrailVersion: {guardrail_ver}\n'
                    'X-Amzn-Bedrock-Trace: ENABLED'
                )

options = ClaudeAgentOptions(
                model=model,
                env={
                    **guardrail_env,
                },
            )

Source: anthropics/claude-agent-sdk-python

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