Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full disclosure burden, yet it says nothing about behavior: whether it errors or returns empty when the Source Monitor is empty, whether it is read-only, or what the response looks like. 'What is open' only weakly implies a safe read.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.