As described, an artificial intelligence (Al) design application exposes various tools to a user for generating, analyzing, evaluating, and describing neural networks. The Al design application includes a network generator that generates and/or updates program code that defines a neural network based on user interactions with a graphical depiction of the network architecture. The Al design application also includes a network analyzer that analyzes the behavior of the neural network at the layer level, neuron level, and weight level in response to test inputs. The Al design application further includes a network evaluator that performs a comprehensive evaluation of the neural network across a range of sample of training data. Finally, the Al design application includes a network descriptor that articulates the behavior of the neural network in natural language and constrains that behavior according to a set of rules.