Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden of transparency. It states the action and result (PID listing) but does not disclose additional behavioral traits such as whether sessions are scoped to the current device, whether the operation is side-effect free, or what happens when no active sessions exist. The simple read-only nature is implied but not explicit.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.