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 deleting'), which is critical, but fails to mention other behavioral traits such as permissions required, whether the action is reversible, rate limits, or what happens if the trash is already empty. This leaves significant gaps for a destructive operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.