Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool has no parameters, no output schema, and no annotations, the description adequately covers the purpose, the fields returned, the prerequisite, and the read-only nature. It does not explicitly state the return format (e.g., array of objects) or behavior when there are no revisions, but the listed fields imply the structure. This is sufficient for a simple retrieval tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.