Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description explicitly states 'will not modify Revit', which reinforces the annotations readOnlyHint=true and destructiveHint=false, but it does not contradict them. It adds specificity about what is listed (layouts, roles, angles, etc.), which is helpful. However, it does not disclose any additional behaviors such as pagination, sorting, or performance characteristics. Given annotations already cover the safety profile, this description adds modest value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.