Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare the tool as read-only, idempotent, and non-destructive, which the description does not contradict. However, the description adds no additional behavioral context, such as temporal resolution, units, or geographic limitations beyond the word 'Norway'.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.