Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It usefully discloses the returned data (connection, version, open mod), but does not state that it is a read-only, side-effect-free probe, nor what happens or is returned when the editor is not connected.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.