Update app.py

app.py

@@ -1058,7 +1058,15 @@ demo_description3 = """
 Upload a PDF, TXT, or DOCX file and ask a question about its content.
 This demo uses **GPT-4o-Mini** to answer questions based on the content of your uploaded document.
 
-Feel free to ask any question related to your document.
+Note: This is a **strict RAG-based QA** system. It will only answer questions if the answer is explicitly found in the uploaded document.
+For more flexible or general-purpose responses, please try Tab 1 (Multi-Agent Assistant).
+
+Typical Use Cases:
+- Legal, technical, or academic documents where factual precision is critical
+- Internal company reports where hallucination must be avoided
+- Medical papers where only referenced content should be discussed
+
+Feel free to ask any question directly related to your document.
 """
 demo_description4 = """
 **Context**: