A 401 can be a wrong environment, not a wrong token

A developer debugging question about checking host, token source, issuer, audience, and CLI profile before rotating credentials.

When an API returns 401, do you check the token first or the environment first? I have seen valid staging tokens sent to production hosts, CLIs reading the wrong profile, and audience claims that did not match the API. Rotating credentials would not fix those cases. My current order is host, token source, issuer/audience, profile/config file, then expiry or role scope. What is your fastest way to separate a bad token from a bad environment?