Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the absence of annotations, output schema, and any parameter details, the description is too sparse to be complete. It does not explain the selection behavior (e.g., exact name match, case sensitivity, whether it operates on the active sequence), nor does it provide enough context for an agent to know if this tool is suitable for a given task. The tool's simplicity does not excuse the lack of essential behavioral details.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.