Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, destructiveHint. The description adds ordering of the mod team (founder, admins alphabetically, moderators alphabetically), a cap of 12, and that it's public and requires no auth gate. This adds useful context beyond annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.