Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries full responsibility. 'List' implies a read-only, non-destructive operation, and the admin session requirement is disclosed. However, it does not describe behavior when authentication fails, the response format, or any potential performance implications for large user lists.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.