Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It states the tool can 'move or rename' items, implying mutation, but doesn't address critical aspects like permissions required, whether operations are atomic or batched, error handling, or what happens if destinations already exist. This leaves significant gaps for a mutation tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.