Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a batch mutation tool with complex nested parameters (1 parameter with 8+ sub-properties), 0% schema description coverage, no annotations, and no output schema, the description is severely incomplete. It doesn't address behavioral aspects, parameter meanings, error handling, or what the tool returns.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.