Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With no output schema, no annotations, and no parameter explanation, the description is the only source of contextual information. It does not help an agent choose between read_file, read_project_file, and read_change_file, nor does it explain how the return content is delivered. The tool may be callable, but the context is not sufficient for confident selection.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.