Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already disclose destructiveHint=true and that the operation is not idempotent. The description adds that the deletion includes panels, that it can be undone via Agent activity, and that it is refused for specific entry types. This is useful beyond annotations, but it does not cover permissions, rate limits, or exact reversal mechanics.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.