Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple tool with one parameter and no output schema, the description adequately conveys the core function. However, it could be slightly more complete by hinting at what 'status' entails (e.g., running, completed, failed) or how to handle missing sessions, but the current form is sufficient for basic selection and invocation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.