Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's moderate complexity, rich annotations (idempotent, non-destructive), and existing output schema, the description provides complete context. It covers purpose, usage alternatives, behavioral implications, and parameter meaning without needing to explain return values (handled by output schema).
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.