How can i describe my friend to a Toolbox ?

Think beyond the object itself. For example, a hammer is a useful tool to work with. Maybe your friend is a helpful person. What can a screw do that is useful? Can it relate to your friend? I had a similar ignment in my creative writing cl. What also helps if you are really stuck and need ideas is to read other poems with similes in them. You can study the structure of the poem and get your own idea