Habits
Call early when your site falls
In one line: As soon as the attack enters your site, say so, even before you have all the information.
Why
Teammates need seconds to rotate. A call made early ("they are on B, lots of them") can be worth the retake; one made late leaves the spike planted with nobody nearby.
How to train it
Use short phrases, straight away: site, how many, utility. If you later find out there were fewer, correct it: that beats a late call.