Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations and no output schema, the description carries the full disclosure burden and falls short: it doesn't say what "muestra" returns (file, URL, parsed text), what happens when no CV is attached, or whether a session is required. The name implies a list ("listar") while the description implies a single attached CV, adding ambiguity.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.