Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations exist, so the description carries the full burden. It discloses the conversion scheme (one row per feature, properties as columns, geometry flattened) and the return type (plain text CSV), giving the agent a clear behavioral model. However, it does not mention handling of nested properties or non-FeatureCollection inputs, which could be edge cases.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.