Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description bears full responsibility. It discloses key behaviors: using cached coordinates (implying potential staleness) and not re-identifying the grid. This informs the user of trade-offs (speed vs. accuracy). However, it does not mention what happens if cached coordinates are invalid or other mutation effects.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.