This tool is used to export the table schemas that the Replicator Agent will use to build the tables on its database. It will output a downloadable zip file of all the table schemas as XML files which you can then provide to the Agent. It will do this for all the tables you have defined in your Bulk Shares and Dynamic Shares, with respect to all the child tables as necessary as well.
The modules is located at the bottom of the Replicator section
Warning: downloading a large number of table schemas will result in long download times, and you browser may prompt you to kill the web page. If you do see a prompt click 'Wait'