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E1403. Rate limit exceeded

Severity: ERROR. Fail-closed on the hook enforcement path.

What happened​

The hosted backend rate-limited this client (HTTP 429 with a Retry-After header). The SDK does not retry automatically, and hook enforcement fails closed: the guarded tool call is denied rather than allowed through ungoverned.

How to fix​

Wait for the Retry-After window (60s by default) and retry. If you see this consistently, your usage may have crossed your tier's limit. Check the dashboard's Usage page.

See also​