Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It states the tool lists open documents with specific fields, but does not disclose any side effects, permissions, or caching behavior. For a read-only list operation, the minimal disclosure is acceptable but leaves room for ambiguity.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.