Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It discloses two critical behaviors: recursive logical path updates for all descendants and that OSS bytes remain unchanged. This goes beyond a bare 'move' statement and provides meaningful insight into the tool's side effects, though it omits details about permissions, atomicity, or return values.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.