Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and idempotentHint=true, but the description goes well beyond them: it specifies that only the cron schedule is removed while the saved workflow definition survives, gives the recovery path (re-save via `schedule_task`), and documents success/error return behavior. For a destructive tool, disclosing the exact scope of destruction and what is preserved is exactly the added value needed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.