Unless you're running your own search engine for yourself, search indexes and vector databases already manage what data they want to ingest, they contain rank weights, keyword aliases, and prefiltering for controlling the search result in favor of the service provider's desired outcome. And these all run on someone else's hardware maintained on someone else's budget.

Adding an LLM or agentic data flow and a tuned prompt to the mix does nothing to change who is in charge, it was never you.