Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, indicating a non-mutating operation. The description adds the requirement for legal grounds (consent) and discloses the cost per call, which are useful behavioral and compliance details. However, it does not describe what happens on failure (e.g., invalid image, non-Korean license) or how the image is handled, leaving some gaps. The added consent and cost info go beyond annotations, warranting a 3.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.