Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses that the tool returns a repetition count and virtues, which is useful, but it does not mention error behaviors (e.g., invalid/nonexistent ID), data format, or whether the operation is read-only. The description gives some transparency but lacks depth.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.