Preflop debate

[Brom]

A friend and I had a little argument over whether or not to 3 bet this hand preflop or just cold call. We are looking for other people's thoughts/opinions on it. If you could just type what you think you'd do and why, we would appreciate it. Thanks.

As an edit im adding in that Villain is 12/5/2.5 after about 100 hands.

Party Poker 2/4 Hold'em (9 handed) converter

Preflop: Hero is Button with A[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">MP2 raises</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">2 folds</font>, UTG+1 folds, <font color="#CC3333">MP2 caps</font>, Hero calls.

Flop: (10.50 SB) 2[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP2 bets</font>, Hero folds.

Final Pot: 5.75 BB