I agree with the ruling, but this makes me wonder if it will be possible to have any AI agent at all if it's consistently applied. After all, if I can get ChatGPT or Claude to say something false that should count too, right?
The arguments of the ruling should generally apply even when the AI agent makes false statements it wasn't notified about. But in that case the defendant might have a stronger claim about not being able to reasonably ensure the correctness of all statements, and having taken reasonable measures to ensure correctness. Google couldn't really claim any of that after ignoring cease and desist letters about the false claims