Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It does reveal the mechanism: run `describe`, read the session's latest run log, and return basic info to the caller. However, it does not mention prerequisites (e.g., a dataset must be loaded), potential side effects on the session, or what happens on failure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.