Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare the tool as readOnly, idempotent, and non-destructive. The description adds valuable behavioral details by outlining the response structure for the two main states (authenticated:true with empty pending[] vs. connect_url and per-install URLs). It does not contradict annotations and provides context beyond the safety profile.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.