Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a complex creation tool with 2 parameters (one being a deeply nested object), 0% schema description coverage, no annotations, and no output schema, the description is severely inadequate. It doesn't explain the parameter structure, expected return values, error conditions, or behavioral constraints that would help an agent use this tool correctly.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.