Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a zero-parameter, read-only list tool, the description is adequate. It clearly states the action and resource, and the presence of an output schema compensates for the lack of return-value explanation. A slight caveat is that 'indexer flags' could use a brief clarification, but overall it is complete enough for a simple operation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.