Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly, idempotent, non-destructive, and closed-world, so the safety profile is fully covered. The description adds value by naming what is returned (connection status and version) and clarifying that the check is over a local native IPC channel rather than a network endpoint, which reinforces the openWorldHint=false claim.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.