Google Webmaster Tools provides you with detailed reports about your pages’ visibility on Google, and keeps tracks of your sites overall health. A recent upgrade was made to the Structure Data dashboard to now show specific items with errors. This change will allow you to easily fix the issues you are having with the structured data markup. This will also result in more comprehensive reporting.

Check out the new upgrade to Google Webmaster Tools today, and read the Google Webmaster Central Blog for more information.

http://googlewebmastercentral.blogspot.com/2013/12/structured-data-dashboard-new-markup_12.html