Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Goes well beyond the annotations: destructiveHint=true only says it's destructive, whereas the description discloses the soft-delete semantics, the 30-day restore window, and crucially that running executions are not cancelled. It does not mention permission requirements or what happens on a second delete of an already-deleted flow (relevant given idempotentHint=false).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.