Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It only states the source 'desde zona_clases' and the listing action, which implies read-only behavior but does not disclose things like authentication requirements, whether only active courses are returned, pagination, or response characteristics. This is a minimal behavioral disclosure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.