Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without any annotations, the description carries the full burden. It only states 'List', implying a read operation, but does not disclose any behavioral details such as rate limits, data freshness, order of sections, or dependencies beyond the mapId. For a simple list tool, more context would be helpful.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.