Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false, so the safety profile is covered. The description adds useful timing context ('once published') for when links/receipts become available, but says nothing about caching, freshness, or polling behavior for posts still in flight.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.