Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so the safety profile is covered. The description adds the genuinely useful precondition that a trusted owner and an interactive desktop session are required, but says nothing about the returned value or failure behavior when the desktop is not interactive.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.