Beyond Flat Search
Standard RAG can be noisy. **Metadata Filtering** allows you to narrow the search before the vector similarity is even calculated. For example, "Only search for documents from 2023" or "Only look at files in the 'Finance' category." This significantly increases retrieval precision and reduces noise.
Dynamic Filtering
LangChain agents can use their reasoning to decide which filters to apply based on the user's question. If a user asks "What was the Q4 budget?", the agent automatically adds a