I believe the "tools" that good poets use are just using the right words to describe a situation. In the poem I'm learning, Henry Longfellow uses a lot of similes and resemblances of the situation. Because of this, I can picture the scene in my head and all the right details of people, things, and ideas. To write with a picture in your head also helps the readers to picture it. I think just using the right words and pictures in your mind help you put together a very good poem.