Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (0 parameters, output schema exists), the description is adequate but minimal. The output schema will document return values, so the description doesn't need to explain those. However, for a tool that presumably accesses deleted/sensitive data, more context about permissions, scope, or limitations would be helpful despite the structured fields.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.