Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already cover safety (destructiveHint=false, idempotentHint=true, readOnlyHint=false), so the bar is lower. The description adds real behavioral context beyond them: what is suspended (planner fill, drafting, publishing), that no credits are consumed, and that manual actions remain available — a useful disclosure for a mutation tool. It doesn't mention permissions or whether already-scheduled items are affected.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.