"Manuscript requests" refers to the act of asking someone to send you a written document, like a book, essay, or article, for review or consideration. Full definition
I had two full manuscript requests within my first ten agent queries, so I knew the book had something going for it. (wiseinkblog.com)
It took me multiple books and countless queries to get this particular skill down and start reliably receiving manuscript requests, but if I can do it, you can too. (writerunboxed.com)
Despite what I now realize was a truly awful query letter, I got a lot of manuscript requests. (victoriastrauss.com)