Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It discloses the destructive nature ('permanently delete'), which is crucial behavioral information. However, it lacks details about permissions required, whether the action is reversible, rate limits, or what happens if the object doesn't exist. The word 'permanently' adds some value beyond just 'delete'.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.