What should leaders say when they do not yet know every effect of an AI change?
Employees' concerns about work and job security came up in the culture discussion, and an announcement shouldn't promise certainty the organization doesn't have. Say what's changing and why. Then name what's still undecided and when people will hear more.
Start with what's changing now, which teams and tasks it touches and when. Keep a confirmed decision apart from an ambition that's being tested.
Then name what's undecided, especially anything touching responsibilities or workload, along with who will decide and when employees can expect another update. A broad line about opportunity doesn't answer a direct question about someone's work, so don't use it to dodge one.
Give people a way to ask questions and tell them how answers will come back. Some questions need private handling. Offer a route for those, and don't ask anyone to share personal circumstances in a group meeting.
Then show up at the review point you named, even if the answer is still incomplete. Honest communication keeps going through the whole change. One reassuring message at launch can't do it.