Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with only two optional enum parameters, no required params, and no output schema, most of the picture is present: purpose, safety, and redaction behavior. The clear gaps are that privacy_mode values are left undefined and no sense of output shape, ordering, or history depth is given, though the redaction note partially substitutes for an output schema.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.