Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already provide readOnlyHint=true年代 and idempotentHint=true, so the safe read-only nature is covered. The description adds value by explaining the two output states (authenticated vs. requires connection), which is behavioral context beyond annotations. It doesn't describe rate limits or side effects, but with readOnly annotations, that's less critical. Given annotations carry the safety disclosure, this is adequate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.