Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
For a low-complexity, three-parameter tool with an output schema, the description covers the critical operational caveats: admin-only access, financial/write nature, and the need to confirm with the user. The main gap is the undocumented restaurant_id and menu_item_id semantics, though their roles are largely inferable from the parameter names and tool title.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.