Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with 2 parameters (including a complex nested object), 0% schema coverage, no annotations, and no output schema, the description is inadequate. It doesn't compensate for the missing structured information about parameters, behavior, or return values, leaving the agent with insufficient context to use the tool effectively.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.