business - Is it possible to grant the license of photos before the commissioned shoot?

I'm being commissioned to photograph 10 animals for a breeder of reptiles and I am in the process of making the license.

Most license templates I see, include either clear descriptions/titles(what does that mean?) of the image or have an attachment of the printed files themselves.

So to my understanding I explain that at first, my creative fees are paid to commission the shoot, then after will the licensing fees be paid. Is this correct information?