J., No tools are necessary. The body of the cot simply unfolds and then you put head and foot pieces (one each) on by hand. It is very simple. I have used the cot a few times since I bought it and find it entirely satisfactory.
No screws (that I remember). My 10 year old was able to put it together quickly without even looking at the instructions. Really, it was easy. We found it easier to put it all together and then attach the velcro at the head last. The directions say to close the velcro around the beam and then attach to the side bars, but that was too hard for us. We love the carry bag.