This is a future argument settler.
Little and Less
You may play this card during any response window.
Response: Until the end of the phase, players cannot play any additional responses. (Cannot be canceled.)
Just to clarify, this means that you cannot play events that trigger as a Response, right?
If so, I really wish it said that more specifically because you don't play Responses, you trigger them. You play Events, Characters, Locations, Attachments, etc. Better text would be "…players cannot play any Events that trigger as a response." if it only affects Events.
Not that I can think of any other card type that could be played as a Response, but I just want to be sure they didn't mix up terminology designing this event and don't want to add it to my deck assuming it works differently than I think.
~Haven't they learned to be as specific as possible?