Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with 1 complex parameter (nested object with 4 properties), 0% schema description coverage, no annotations, and no output schema, this description is completely inadequate. It doesn't explain what the tool does, how to use it, what parameters mean, or what to expect as output. The agent lacks essential context for successful tool invocation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.