Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description builds on this by adding concrete output behavior: when all providers are connected it returns authenticated:true with empty pending[], and when credentials are missing it returns connect_url and per-install URLs. This provides useful behavioral detail 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.