First and foremost, have a clear picture of what you want from your project. The clearer it is for you, the more detailed and helpful you will be able to write it in your description. Take some time and list as many features and aspects as you can. Initially, be overly detailed. Then you can tailor it back to streamline the actual posting.
As important as it is to clarify your project, it’s also crucial to refine it so it’s not too long. Pages of description can put contractors off and might flag you as a pain. Being concise is the key.
The point is not to inundate your prospective contractor with minutiae, ...