THE TOOLS AND MONTE CARLO WORKING GROUP Summary Report from the Les Houches 2009 Workshop on TeV Colliders حسب Butterworth, J, Maltoni, F, Moortgat, F, Richardson, P, Schumann, S, Skands, P, Alwall, J, Arbey, A, Basso, L, Belov, S, Bharucha, A, Braam, F, Buckley, A, Campanelli, M, Chierici, R, Djouadi, A, Dudko, L, Duhr, C, Cordero, F, Francavilla, P, Fuks, B, Garren, L, Goto, T, Grazzini, M, Hahn, T