Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no annotations, no output schema, and 0% parameter description coverage, the description is the only source of guidance an agent has, and it supplies essentially none. It does not explain the return artifact, required context, or how the inputs shape the plan, making it inadequate for a 3-parameter tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.