Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It discloses key behavioral traits: the tool is deterministic (no AI generation), returns exact text, and uses public-domain translations. This is valuable context for an agent deciding between this and study tools. It could mention error handling or return formatting, but for a simple retrieval tool, the transparency is above average.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.