Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (one optional parameter, no output schema, no annotations), the description is mostly sufficient. However, it does not detail what statistics are returned, how output varies between text and JSON, or how errors are handled, leaving minor gaps for an agent relying solely on this text.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.