Trade Agreement Assessment Act - Directs the International Trade Commission (ITC) to report periodically to Congress on each free trade agreement in force with respect to the United States, including: (1) its effect on the U.S. economy and on specific U.S. industry sectors; (2) a summary of how each country that is party to such agreement has changed its labor and environmental laws; and (3) whether the agreement is making progress in achieving the objectives of the Bipartisan Trade Promotion Authority Act of 2002.