Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, idempotentHint=false and readOnlyHint=false, so safety is covered. The description adds genuine scope context — what is destroyed (the timeline) and that only the FCA document is affected — but says nothing about reversibility, undo, or authorization requirements beyond the confirm flag.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.