How would you even track down who deployed the agents? Wouldn't that even incentivize the agent to cover their tracks even better and be untraceable
In cases where the operator is not the manufacturer, the operator can decide if they should in turn sue to manufacturer because they built faulty machinery.
So many other problems. If we apply this law to cruise control - simple outcome. We get no cruise control.
EDIT: to be less snarky, there are obvious exceptions if a manufacturer defect is involved. But I still imagine it turns on things like foreseeability and proximate cause (IANAL). Nevertheless, if you were asleep at the wheel, you're getting held responsible.
The reason why we have cruise control is that manufacturers went to great lengths to make sure that it works as intended. Threat of lawsuits is what made them do that.