Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false and destructiveHint=true, so the safety profile is known. The description adds nothing beyond the annotations: it does not say whether the delete is permanent or recoverable, what happens to attached files/checklist items, or whether a nonexistent task errors out.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.