Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (2 params, no output schema, annotations present), the description adequately covers the tool's behavior and context. It could be enhanced by briefly mentioning the output format (e.g., list of case IDs and similarity scores), but it is sufficient for a ranked list tool that mirrors a known UI element.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.