By Trenton Moss

An automated accessibility tool is a piece of software that can test a Web page, or even an entire Website, for accessibility. Automated accessibility tools are useful because they can save you a huge amount of time. Don’t want to check images for alt text on each and every page on your Website? Run the site through an automated tester and it’ll do all the checking for you!

But are these tools a little too good to be true? I think so. Can you really test a Website for accessibility so easily? Unfortunately, the answer is a resounding no. Numerous problems are associated with using automated tools alone to test a site’s accessibility.
Full article at
http://articles.sitepoint.com/article/automated-accessibility-trap