Pastore is a powerful gem for Rails that simplifies the process of validating parameters and controlling access to actions in your controllers. With Pastore, you can easily define validations for your parameters, ensuring that they meet specific requirements before being passed to your controller actions. Additionally, Pastore allows you to easily control access to your actions, ensuring that only authorized users can access sensitive information. With its intuitive interface and robust features, Pastore is a must-have tool for any Rails developer looking to improve the security and reliability of their application.