Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the agent knows this is a safe read operation. The description adds useful context about the two possible states (all connected vs. missing credentials) and what URLs are returned. It doesn't describe the exact structure of the response beyond the mentioned fields, but with annotations covering the safety profile, this is acceptable.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.