Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a zero-parameter tool that simply fetches a static document, the description is quite complete: it names the document, the repository, and the return format. The presence of an output schema further reduces the need for describing return structure. However, it does not mention potential error cases or versioning, which could be useful but are not critical for such a simple operation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.