Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a zero-parameter diagnostic tool with no output schema, the description is close to sufficient, but it stops short of describing the expected result shape (e.g., status fields, credential-validity indicator). The absence of annotations and output schema makes that missing return-context a real, though small, gap.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.