How do I build trust on a guarded team?

You are leading a group of people who have learned to guard themselves. They watch what they say, play the angles, and keep the honest thought to themselves. It is a tiring place to work, and it does not fix itself, because no one wants to be the first to lower their shield. Trust is rebuilt slowly and it starts at the top. People are guarded because at some point honesty cost someone something here. They are waiting to see if it is safe. That means the first move is yours, not theirs. You cannot demand trust into existence, but you can go first and make it a little safer for the next person. This week, do one thing that models the openness you want. Admit a mistake of your own in front of the team. Ask a real question and actually listen to the answer without punishing it. One act will not turn it around. But people are watching to see what happens to the first honest word. Make sure that when it comes, it is met well.