diff --git a/tools.py b/tools.py
index f5f2e61..b68e819 100644
--- a/tools.py
+++ b/tools.py
@@ -1,17 +1,20 @@
-"""
-Utility tools used by the deep agent.
-
-The functions are decorated with `@tool` from langchain and can be called by the agent.
-"""
-
+import os
 from langchain.tools import tool
 
 @tool
-def echo(text: str) -> str:
-    """Return the same text – useful for demonstration."""
-    return f"Echo: {text}"
-
-@tool
-def add(a: int, b: int) -> int:
-    """Add two integers."""
-    return a + b
+def get_price(symbol: str) -> str:
+    """Return the current price for a given stock symbol.
+    For demo purposes, this function returns a mocked value.
+    In a real implementation you would query an API such as Yahoo Finance or Alpha Vantage.
+    """
+    # Mocked response – replace with real API call
+    prices = {
+        "AAPL": 150.12,
+        "GOOG": 2750.45,
+        "MSFT": 299.87,
+        "TSLA": 720.33,
+    }
+    price = prices.get(symbol.upper(), None)
+    if price is None:
+        return f"Price for {symbol} not found."
+    return f"The current price of {symbol.upper()} is ${price:.2f}."