Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
With an output schema present, return values need no explanation, and the description covers the alternative tool, credential requirement, cost, and notes behavior. A reader still lacks any hint about graph size or scope limits of the neighborhood, which is a minor gap for a subgraph-returning read.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.