Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a tool with no parameters, no output schema, and no annotations, the description fully covers the essential context: it resets runtime mappings, and it is destructive. The sibling tools (mock_create, mock_delete, request_clear) provide additional context, but the description itself is self-sufficient for this simple operation.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.