Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with 2 parameters, no annotations, no output schema, and 0% schema coverage, the description is insufficient. It doesn't cover parameter meanings, behavioral traits, or return values, leaving the agent with inadequate information to use the tool effectively beyond its basic purpose.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.