Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description confirms the destructive nature ('Delete'), which aligns with the annotation 'destructiveHint: true'. It adds context that it operates on 'memory' by 'key', but does not reveal side effects or error behavior. Since annotations already cover safety profile (destructive, idempotent), the description adds moderate value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.