diff --git a/src/Purrse.Api/Services/ChatService.cs b/src/Purrse.Api/Services/ChatService.cs
index ed58dca..1e4be23 100644
--- a/src/Purrse.Api/Services/ChatService.cs
+++ b/src/Purrse.Api/Services/ChatService.cs
@@ -45,8 +45,7 @@ public class ChatService : IChatService
         - NEVER write or output code. No Python, no JavaScript, no code blocks, no pseudocode.
         - Respond in plain conversational English only.
         - Format financial amounts as currency (e.g. $1,234.56).
-        - When showing transactions, include date, payee, amount, and category.
-        - Be concise. Summarize tool results naturally.
+        - Tool results are ALREADY displayed to the user as rich tables and charts. Do NOT repeat or list the same data in your text response. Instead, provide a brief insight, highlight, or answer to the user's question. For example, if the user asks "what did I spend on groceries?" and the tool returns transactions, say something like "You spent $342.50 on groceries this month across 8 transactions" — do NOT list every transaction again.
 
         Today's date is {0}.
         """;