Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. 'Obtiene' implies a read-only operation, but the description does not state whether it requires authentication, returns a specific format, or has any side effects. For a simple table retrieval, this is minimal but still misses an explicit statement of non-mutating behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.