I used to be able to ask Siri: "Hey Siri, please set the lights to green." Then she would obediently set all of the lights to green. Nice, that's my favorite!
Then a few months ago some update was pushed (iOS? Apple Home app? Philips Hue app? Philips Hue Basestation OS? No idea) and now that exact phrase (which has worked for two years) suddenly elicits a response: "OK, which room?" -- followed by a listing of the rooms in which I have devices and a catch-all "Everywhere".
So now I've had to change my incantation: "Hey Siri, please set all of my lights to green."
I'm just waiting for her to start asking "Do you want Lime Green, Aqua Green, or Vomit Green?". Or worse, maybe she'll just give up and say "OK, here's a list of Google results for Green Lights." Maybe even throw a captcha in there asking me to select the green lights at intersections, just for good measure.