Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has no parameters, no output schema, and no annotations, the description is minimally adequate. However, it lacks details about what 'I/O signals' includes (e.g., all signals? filtered?), and there is no mention of return format. For a simple listing tool, this is acceptable but could be improved.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.