Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It clearly indicates a read operation via 'Obtiene' and names the data returned, but it does not explicitly state that no data is modified, whether authentication is required, or what happens if the user is not authenticated. The implicit read-only nature is clear enough for a simple profile fetch, but the description adds little beyond the action itself.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.