If I hire an engineer and that engineer authorizes an "agent" to take an action, if that "agentic action" then causes an incident, guess whose door I'm knocking on?

Engineers are accountable for the actions they authorize. Simple as that. The agent can do nothing unless the engineer says it can. If the engineer doesn't feel they have control over what the agent can or cannot do, under no circumstances should it be authorized. To do so would be alarmingly negligent.

This extends to products. If I buy a product from a vendor and that product behaves in an unexpected and harmful manner, I expect that vendor to own it. I don't expect error-free work, yet nevertheless "our AI behaved unexpectedly" is not a deflection, nor is it satisfactory when presented as a root cause.