Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
This is a simple search tool with only two parameters, no output schema, and no nested objects. The description covers what is searched and what is excluded, which is sufficient for most invocation contexts. It does not explain how it differs from fetch_doc, but that is a minor gap given the low complexity.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.