Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the simplicity (one parameter, no output schema) and the presence of readOnlyHint, the description covers the essential context: purpose, behavior, constraints, and enough detail about expected output via the listed profiling aspects. It does not explain return format details, but since no output schema is provided, the natural-language list of what is profiled is sufficient for an agent to anticipate the result.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.