Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare the tool is read-only, idempotent, and non-destructive. The description adds useful behavioral context by specifying what the returned full record includes: contact, GPS, reservation URL, accessibility, and agency. There is no contradiction with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.