Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a read-only search tool with an output schema, the description conveys the essential scope: authorized user, privacy level, workspace restriction, and search backend. It does not explain query syntax or pagination, but given the low complexity, existing schema descriptions, and read-only annotations, it is largely sufficient.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.