Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already mark this as read-only, idempotent, and non-destructive. The description adds meaningful behavioral detail: it explains the response conditions (authenticated:true with empty pending[] when all connected, and connect_url plus per-install URLs when credentials are missing), which goes well beyond the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.