The TRIST tool helps policy makers in developing countries understand how changes in trade policies will affect their economy. It uses real revenue data to predict the impact of tariff reforms on government income from imports. The tool is easy to use, transparent, and can be customized to fit different needs. It shows which products or industries will be most affected by tariff changes, allowing for better decision-making. Overall, TRIST provides valuable insights into the short-term effects of lowering tariffs on a country's economy.