Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, readOnlyHint=false, and non-idempotent, so the safety profile is covered. The description adds two real behavioral facts beyond that: only unlocked notes can be deleted, and the deletion may propagate to other devices via sync. It does not say whether the deletion is recoverable or goes to a trash, which is the most important missing behavioral detail for a destructive tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.