Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint and destructiveHint, but the description goes further by revealing the actual response structure (authenticated boolean, pending array, connect_url) and how it varies by connection state. This adds meaningful context beyond the annotations and does not contradict them.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.