diff --git a/contributing/samples/hello_world_ma/agent.py b/contributing/samples/hello_world_ma/agent.py
index 98e79a39..a6bf78a9 100755
--- a/contributing/samples/hello_world_ma/agent.py
+++ b/contributing/samples/hello_world_ma/agent.py
@@ -15,6 +15,7 @@
 import random
 
 from google.adk.agents import Agent
+from google.adk.examples.example import Example
 from google.adk.tools.example_tool import ExampleTool
 from google.genai import types
 
@@ -66,43 +67,47 @@ def check_prime(nums: list[int]) -> str:
   )
 
 
-example_tool = ExampleTool([
-    {
-        "input": {
-            "role": "user",
-            "parts": [{"text": "Roll a 6-sided die."}],
-        },
-        "output": [
-            {"role": "model", "parts": [{"text": "I rolled a 4 for you."}]}
-        ],
-    },
-    {
-        "input": {
-            "role": "user",
-            "parts": [{"text": "Is 7 a prime number?"}],
-        },
-        "output": [{
-            "role": "model",
-            "parts": [{"text": "Yes, 7 is a prime number."}],
-        }],
-    },
-    {
-        "input": {
-            "role": "user",
-            "parts": [{"text": "Roll a 10-sided die and check if it's prime."}],
-        },
-        "output": [
-            {
-                "role": "model",
-                "parts": [{"text": "I rolled an 8 for you."}],
-            },
-            {
-                "role": "model",
-                "parts": [{"text": "8 is not a prime number."}],
-            },
-        ],
-    },
-])
+example_tool = ExampleTool(
+    examples=[
+        Example(
+            input=types.UserContent(
+                parts=[types.Part(text="Roll a 6-sided die.")]
+            ),
+            output=[
+                types.ModelContent(
+                    parts=[types.Part(text="I rolled a 4 for you.")]
+                )
+            ],
+        ),
+        Example(
+            input=types.UserContent(
+                parts=[types.Part(text="Is 7 a prime number?")]
+            ),
+            output=[
+                types.ModelContent(
+                    parts=[types.Part(text="Yes, 7 is a prime number.")]
+                )
+            ],
+        ),
+        Example(
+            input=types.UserContent(
+                parts=[
+                    types.Part(
+                        text="Roll a 10-sided die and check if it's prime."
+                    )
+                ]
+            ),
+            output=[
+                types.ModelContent(
+                    parts=[types.Part(text="I rolled an 8 for you.")]
+                ),
+                types.ModelContent(
+                    parts=[types.Part(text="8 is not a prime number.")]
+                ),
+            ],
+        ),
+    ]
+)
 
 prime_agent = Agent(
     name="prime_agent",