Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds significant behavioral details beyond the annotations: 'permanently delete', 'link stops working immediately', 'slug is freed', and 'safe no-op' for already-deleted pages. Annotations already indicate destructiveHint=true and readOnlyHint=false, and the description reinforces and expands on these.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.