Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. 'The full token is returned once' is a genuinely useful behavior disclosure because it tells the agent/caller that the secret must be captured immediately. But it does not cover auth requirements, permissions, key scopes, or any destructive/ireversible effects of creation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.