Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, idempotentHint=true and destructiveHint=false, so the safety and repeatability profile is covered. The description usefully adds that all features are recalculated, which signals a potentially long-running rebuild, but says nothing about failure modes or what happens to suppressed/failed features.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.