Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a batch mutation tool with 1 parameter (but complex nested structure), 0% schema description coverage, no annotations, and no output schema, the description is inadequate. It doesn't explain the input format, behavioral constraints, error handling, or what the tool returns. Given the complexity and lack of structured documentation, the description should provide significantly more context.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.