A database diagnostics system with an interface system that may be used to define, monitor, and deploy database diagnostics tools is presented. The interface system presents a user with a user interface for defining the parameters, behaviors, and schedules of database diagnostic tools. The diagnostic tools execute on a target database recording database parameters and state information. The interface system may present the user with a graphical user interface for assembling diagnostic tools at least partially from a predefined set of reusable modules and scripts.