Interfacing with applications via dynamically updating natural language processing

A method of interfacing with applications, comprising:

• activating, by a digital assistant component executed by one or more processors, responsive to first input audio, an application for execution on a client computing device and cause the application to declare, to the digital assistant component via a protocol, a function the application is configured to perform;
• subsequent to activating the application and based on the function declared by the application, modifying, by the digital assistant component, a natural language processing technique responsive to the function declared by the application;
• receiving, by the digital assistant component, second input audio;
• processing, by the digital assistant component via the modified natural language processing technique, the second input audio to detect one or more parameters;
• determining, by the digital assistant component, based on a comparison between the one or more parameters and the function declared by the application, that the one or more parameters are compatible for input into an input field of the application activated by the digital assistant on the client computing device;
• generating, by the digital assistant component responsive to the determination of compatibility and based on the one or more parameters, an action data structure for the application;
• inputting, by the digital assistant component, the action data structure into the application via the protocol to cause the application to execute the action data structure and update a user interface element of the application;
• transmitting, by the digital assistant component, a request for a content to a remote data processing system;
• and
• presenting, by the digital assistant component responsive to receipt of the content item from the remote data processing system, a content item selected by the remote data processing system.