Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description itself discloses that the value is predicted, constrains lead_time_swiss to 2–121 hours, and specifies output units in meters per second. It does not mention error behavior or data update characteristics, but for a simple read-only query it provides meaningful behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.