Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full behavioral burden and falls short. 'Cleanup' implies a destructive bulk operation, but the description does not disclose scope, irreversibility, permissions required, or what happens to dependent resources.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.