Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It clearly discloses read-only behavior, local scope, and that it does not access the ChatGPT webpage. It could add detail about return values or error behavior, but the core safety-relevant behavior is transparent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.