Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a simple tool, the description provides a basic understanding of what it does (ranking rows), but lacks details on output structure (what fields are returned), the effect of 'limit' (e.g., default behavior), and edge cases. The absence of an output schema increases the need for such context, which is not fully supplied.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.