Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the complexity (5 parameters with nested structures, 0% schema coverage, no annotations, no output schema), the description is completely inadequate. It doesn't explain parameter usage, return values, behavioral constraints, or how this differs from sibling tools. For a search tool with this level of complexity, the description provides minimal useful context.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.