Agile Tools. When is Whiteboard a Better choice than Softwar

Let's assume that we have a large and shining nail. What is the best tool for the nail? Hopefully, the answer is obvious for the most of us. Now, let's assume that we have a development team and a "shining", promising, cool new agile development process. Most likely the hammer will not help (well, perhaps, but certainly not recommended, as a surprise weapon against irresponsible team members who ignore daily meetings).