Was this All in with AA too much of a gamble?

[Buckmulligan]

This is a live game, with one .50 blind
Hero(BB) - 12.50
UTG - 25.00
MP1 - 11.00
MP2 - 16.00
Button - 15.00

UTG folds, MP1 raises to 1.25. MP2 raises to 4.25. Hero looks and moves all in with A [img]/images/graemlins/spade.gif[/img]A [img]/images/graemlins/diamond.gif[/img]. MP1 Folds, MP2 calls the all in.
Fortunately, this worked out for me... MP2 had JJ and didn't set it. However, was my raise too aggressive? Was it too much of a gamble? Should I have bet less to keep it 3 handed?