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 mentions 'Devuelve' (returns), implying a read operation, but it does not explicitly state that it is safe, side-effect-free, or what happens if the pattern is not found. Beyond the primary action, no additional behavioral context is disclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.