The more information you provide in your description, the greater the chance that someone will email you asking for more information. The purpose of the description is to entice someone to contact you. If there is nothing in your description interesting, why would they contact you. If you state I have a business for sale and nothing more, why would anyone want to contact you. Looks like you are not serious and just trying to find the names of investors.
When you are looking for a house, you tell your real estate agent, here are the parameters that I am looking for: location, price, number of bedrooms, bathrooms etc. If the house does not have these characteristics, the real estate agent will not take you to see the house. If you are a buyer of a business, you will do the same thing, you will look to see if the description meets your criteria and if it does, you will contact the seller.
Many people who are looking to buy a business do not know what they are looking for. Often, they know what they do not want but the buyer of a business often does not know what opportunities are out there. As a result, your listing must appeal to the person who is looking for something but has not narrowed down their search criteria to one particular business. It is important that you provide as much information as possible, discuss opportunities of the business. If you do not make your listing interesting, why would anyone contact you. You can think of the following analogy, is the glass half empty or half full. If you describe the business as the glass half empty, you are writing a negative listing. If you are writing as if the glass if half full, your listing is upbeat and will hopefully entice a potential buyer to write to you.