Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's low complexity (1 parameter, no output schema, no annotations), the description is minimally adequate. It covers the basic purpose and data returned but lacks behavioral context (e.g., error handling, auth needs) and output details. Without annotations or output schema, more completeness would be beneficial, but it meets the minimum for a simple read tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.