I didn’t say anything about paper ... I assume the drawings are going to be electronic generated from a 3D model... duh...and delivered as a pdf.
It is mandatory that a good drawing be provided to the outside manufacturer to completely define the part they are making. When you get one part to make, you have no idea of how it relates to other parts. Many times there are questions and you have to go back to the customer to get these questions answered. Even with a completely detailed part you may have questions. I think the drawing should be done by the original drafter, designer or engineer, except of course when you are designing little blocks with holes in them.
It seems like you are more on the design side, take some time and visit the manufacturing side to make sure you are delivering what they need.