Lower the heart rate and keep the touch soft after hard work. Pass at an unhurried pace, move gently, and finish the session calm and loose.
Five players stand in a ring about 14 yards across, one ball. Pass gently around the ring, then across it, keeping the pace easy and the touch soft. Jog lightly on the spot between passes. Rotate in mobility work or static stretches between laps, and finish with steady breathing.
Nobody skips a cool-down that has a ball in it. That sounds like a trivial observation and it is the main practical argument for this format, because the limiting factor on any cool-down is not its design but whether the players actually complete it. A squad told to jog two laps will jog one and a half and drift towards their bags. A squad standing in a ring passing will still be there in eight minutes.
So treat the ball as a compliance device rather than as technical content. The passing here is not trying to improve anybody. It is giving five tired children a reason to stay in one place, moving gently, for long enough that their heart rates come down.
Which makes the coaching instruction almost entirely about pace. Players speed a passing ring up without noticing, because passing quickly is more interesting than passing slowly, and within three minutes you have a technical drill bolted onto the end of a hard session. Keep saying easy, keep the weight soft, and slow it down every time it creeps.
The touch deserves one mention. A gentle first touch and an unhurried pass is a different feel from a sharp one, and there is no harm in players finishing an evening with a soft touch rather than a snatched one.
Be realistic about the physiology. This lowers the heart rate gradually and keeps players loose and together. It does not undo the session and it is not why anybody feels better on Tuesday. It is a good ending, chosen for practical reasons rather than physiological ones.
Save it to your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block. Or start from a blank pitch and build your own.