Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the behavioral burden. It implies a read-only status check and discloses what is returned, which is useful, but says nothing about failure behavior (what is returned or thrown when the plugin is disconnected) or any timeout/permission characteristics.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.