Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. 'Rename' implies a mutation of the IDA database, but the description does not disclose whether this affects references, requires a specific IDA state, or whether the operation is reversible. It merely states the action without side-effect context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.