Mul test, valdidation works, but printing it doesnt

libs/tools.py

@@ -0,0 +1,11 @@
+from langchain.tools import tool
+
+@tool
+def add(a: float, b: float) -> float:
+    """Adds a+b and retuns the sum"""
+    return a+b
+
+@tool
+def multiply(a: float, b: float) -> float:
+    """Multiplies a*b and retuns the product"""
+    return a*b