Leave the bearer out of the prompt. The hook already ran, and it did not read the token from the model.
What the model can see
The model can see the subject the hook already verified, and a refusal when the hook stopped the call. It cannot see the access token or the client secret. A prompt that asks the model who the caller is ignores the hook. The hook already returned unauthorized when userinfo did not accept the bearer.
Do not copy the token into graph state, crew inputs that tasks render, callback state the model reads, or telemetry context.
Related
| Read | To learn how to |
|---|---|
| Authorizing tool calls for Claude Agent SDK | Refuse work after the subject is known |
| Custom channel auth for Claude Agent SDK | Keep the bearer on the hook |
| Claude Agent SDK | See the planned sample |
| API keys and M2M for Claude Agent SDK | Keep the secret on the caller |