Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and readOnlyHint=false, and the description adds genuinely new behavioral context: the deletion is guarded and will not proceed for ideas tied to a live or launched campaign. It does not state irreversibility or what error/return occurs when the guard trips, though the output schema covers returns.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.