I agree. The signing of a contract to restrict information is either because that information is so good because your trainer has discovered something better than everyone else

, or he's not confident that his routine will stand up to scrutiny. At your stage, most things will work and you probably
will get bigger (if you eat) and stronger following his routine, but whether that will be optimal progress is another matter. I'm not saying his routine is going to be bad. It could be really good, but we have no way of knowing because you're not allowed to tell us.
Keep learning about lifting so that you can evaluate his routine for yourself. Or anybody else's routine for that matter. Remember what you learnt from the SF 5x5 and Mark's routine - it's the big compound movements that drive growth: squat, bench, deadlifts, overhead press, pullups, bent over rows, cleans, etc. If your new routine isn't based around those and you're doing lots of isolation movements, that should raise a big question mark in your head.
And don't let him get you spending all your money on the latest supplements. All you need is whey and maybe creatine. Everything else will have a minimal benefit compared with what you'd get from eating lots of good old food.