First-party information is data owned or directly collected by an organization, such as customer transactions, account records, support history, and purchase details. A chatbot cannot reliably answer a question about a customer's recent purchase history from a foundation model's general training data. It must be grounded in the company's current, authorized customer records to provide an accurate and personalized response. Appropriate identity verification and access controls must also be applied before retrieving the information. Public sentiment is generally evaluated using external public data, while definitions of common scientific terms can normally be answered from general model knowledge. Summarizing global news requires grounding in external news sources rather than proprietary first-party records. Therefore, retrieving specific purchase-history information is the clearest situation where first-party grounding provides essential factual context.