Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden for behavioral disclosure. It mentions locale support but does not reveal any other behavioral traits, such as randomness characteristics or performance. Given the tool's simplicity, the minimal disclosure is acceptable but not thorough.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.