Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Discloses the time range (today + 3 days) and data source (Gaode map). However, no annotations are provided, and the description does not mention other behavioral traits such as update frequency, units, or error handling. With no annotations, the description carries the full burden but only partially fulfills it.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.