But people talking about tools usually mean tools in the concrete sense. Even very complicated tools in the concrete sense, e.g. compilers or CNC mills, only act as multipliers to the operator's ability. A consultant is an agent, not a tool, and this is a better comparison for modern AI. It's an important distinction because an agent can fail or act against your interests through no fault of your own. The ability multiplier is unpredictable and potentially negative.