Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already provide readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds useful behavioral detail beyond annotations: it explains the two possible return scenarios, including authenticated:true and empty pending[] when all providers are connected, and connect_url URLs when credentials are missing. It does not contradict annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.