Yahoo, Bing and Google offer their own webmaster tools for analyzing robots.txt. Dashboard of respective webmaster tool service will tell you what errors their search bots found with your robots.txt file. You can also check your robots.txt with 3rd party sites like shoemoney tools and correct these errors.
Yes. Those tools are pretty useful though most of my robots.txt files are quite simple and don't require much checking.
for analuzing the first you must to know how to create it and what exactly need to be disaloved for search bot. better ask about professional