MP1 has a very wide range here as only 2 BB, you are 2nd to lowest stack and BU sb and BB have comfortable stacks so should be very tight here.
The pot is 660 and you are calling effectively 360 so getting almost 2:1 if BU and blinds fold (which they should most of the time).
I think this is a good spot to get it in as winning this pot will give you a VERY good chance of winning the tourney, losing will hurt but you'll still be 1 double up from the $$$ so not a lot worse off.
If you flod here and so does BU, SB and BB then shortstack will be up to 660 so almost back in the game. If BB calls and loses then shortstack is definitely back in it.
Of course it depends on how lose the others are. If you are fairly confident your stack will get you through to the money then you can fold. I think in general it is a shove though.
you're right though it is at the bottom of our shove range here though, maybe include AJs and AQo depending on shorstacks tightness
Sorry in retrospect my first reply wasn't helpful at all
edit: just realised there are antes too but you get the idea