Answering all of the previous questions should provide sufficient information for a decision to be made about whether a complete invention disclosure should be prepared. Exchanging too much information too soon can, in fact, slow down the process.
If, however, you have a burning desire to communicate information that does not fit in any of the previous categories, this is the place to do it. Please be as brief as possible. (Skip a line between paragraphs and indent the first line of each paragraph.)