Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and idempotentHint=true, and the description adds concrete behavioral detail: it specifies the exact response when all providers are connected (authenticated:true, empty pending[]) and when credentials are missing (connect_url and per-install URLs). This goes beyond the annotation metadata.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.