Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotations already declare this as a non-read-only, destructive operation, and the description adds that it edits recognized native fillet faces by a signed delta in millimeters, which usefully clarifies the parametric nature and direction of the change. However, it does not disclose what else may be affected, how revision conflicts are handled, or what happens when faces are not recognized fillets, so it adds only moderate behavioral context beyond the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.