It's easy to complain about bad tools. It's harder to write a great tool yourself. Once you step into the shoes of an internal tools developer, you realize that you're balancing feature requests and constraints from a dozen different teams and an entire universe of complexity behind what should be a simple UI. In this talk, we'll talk about how to gather information about your users’ needs, how to balance between conflicting requirements, and ways you can fail to build a tool that your coworkers want to use.