A small team inside a large company sounds like the sort of place where somebody else picks it up. Often there isn't anybody else. The person who says yes in the meeting is the person who has to make it true afterwards, with three other opportunities running at the same time.
You would think that makes the promise more careful. Sometimes it does the opposite.
Sitting in front of someone who needs a problem solved, the most useful sound available is yes. Yes, we can integrate that. Yes, we can work around the old system. Yes, that timeline is tight but doable. None of it is dishonest. In the room, with the energy of the room, every one of those is true enough.
They get tested about six weeks later, on a bad week, when the environment is not what the discovery call described and the person who knows how the old system works has left.
What I try to hold now is a duller test. Not can this be done, because almost anything can be done. Can I do this in a normal month, with the team I actually have, while the other three things are also happening. That is a different question and it produces different answers.
The version of you in the meeting is optimistic and well rested. The version who delivers it is neither.
Write the promise for the second one.