I had an awesome tank when I first started keeping aquatic creatures. It only had neos and amanos, the neos had plenty of babies and I don't remember ever seeing an amano chasing or eating a baby. I did see a couple times that an amano was picking a snail out of a shell, I don't know if the snail was already dead or if it killed it. Otherwise, I have never seen amano's harming other creatures.
If it's not a true amano, then I would not put anything with it, I wouldn't even keep it. There are plenty of aggressive shrimp that looks similar to amanos but are actually not. They have larger front Pinchers and their patterns are a little bit different, but otherwise they look exactly like a amanos.
Just my two cents!