Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full behavioral burden and does disclose the key trait: this is a read-only, non-mutating inspection. It also names what is returned, so an agent knows no changes occur. It stops short of stating failure behavior for invalid or non-PE paths.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.