Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has no parameters, an output schema is absent, and the tool is read-only, the description is minimally complete. It lacks detail on the return value format (e.g., boolean toggles or a list). More context would help, but the simplicity of the tool reduces the burden.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.