Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds meaningful behavioral context beyond the annotations: 'Soft archive — history is kept and they can be re-added.' This tells the agent the operation is non-destructive and reversible, consistent with destructiveHint=false and idempotentHint=true. It does not mention auth or side effects, but the annotations already establish the safety profile.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.