Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's moderate complexity (1 parameter, no annotations, but with output schema), the description is complete: it explains purpose, usage, parameter details, and return values. The output schema existence means return format needn't be detailed, but the description still adds helpful context like token estimation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.