The Discover Tool in NotebookLM will find additional data sources for your notebook.
The correct answer is False.
NotebookLM operates entirely as a closed-system research assistant. It relies strictly on the specific documents, text files, and web links manually uploaded into a project workspace. The platform never actively crawls the internet or searches external databases to gather new materials on your behalf.
Instead of discovering outside information, the software focuses completely on the exact data you supply. It reads, synthesizes, and organizes your existing files to help you understand them better. This strict limitation actually serves as a core feature rather than a drawback. By refusing to pull in unverified web data, the system ensures every summary, answer, and generated insight remains perfectly grounded in your trusted, original sources.