Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and idempotentHint=true. Description adds that the tool returns 'current connection status and session details', providing context beyond annotations. It is clear about the type of data retrieved but doesn't elaborate on response format or side effects.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.