Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=false; the description usefully reinforces this by stating it opens no browser and sends no text, making the purely local, offline nature concrete. It does not, however, say what state information is actually reported.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.