diff --git a/src/google/adk/auth/auth_credential.py b/src/google/adk/auth/auth_credential.py
index 6160edcc02..67005780f0 100644
--- a/src/google/adk/auth/auth_credential.py
+++ b/src/google/adk/auth/auth_credential.py
@@ -220,7 +220,7 @@ class AuthCredential(BaseModelWithConfig):
   Examples: API Key Auth
   AuthCredential(
       auth_type=AuthCredentialTypes.API_KEY,
-      api_key="1234",
+      api_key="YOUR_API_KEY",
   )
 
   Example: HTTP Auth
@@ -228,7 +228,7 @@ class AuthCredential(BaseModelWithConfig):
       auth_type=AuthCredentialTypes.HTTP,
       http=HttpAuth(
           scheme="basic",
-          credentials=HttpCredentials(username="user", password="password"),
+          credentials=HttpCredentials(username="YOUR_USERNAME", password="YOUR_PASSWORD"),
       ),
   )
 
@@ -237,7 +237,7 @@ class AuthCredential(BaseModelWithConfig):
       auth_type=AuthCredentialTypes.HTTP,
       http=HttpAuth(
           scheme="bearer",
-          credentials=HttpCredentials(token="eyAkaknabna...."),
+          credentials=HttpCredentials(token="YOUR_TOKEN"),
       ),
   )
 
@@ -245,8 +245,8 @@ class AuthCredential(BaseModelWithConfig):
   AuthCredential(
       auth_type=AuthCredentialTypes.OAUTH2,
       oauth2=OAuth2Auth(
-          client_id="1234",
-          client_secret="secret",
+          client_id="YOUR_CLIENT_ID",
+          client_secret="YOUR_CLIENT_SECRET",
       ),
   )
 
@@ -254,8 +254,8 @@ class AuthCredential(BaseModelWithConfig):
   AuthCredential(
       auth_type=AuthCredentialTypes.OPEN_ID_CONNECT,
       oauth2=OAuth2Auth(
-          client_id="1234",
-          client_secret="secret",
+          client_id="YOUR_CLIENT_ID",
+          client_secret="YOUR_CLIENT_SECRET",
           redirect_uri="https://example.com",
           scopes=["scope1", "scope2"],
       ),
@@ -264,7 +264,7 @@ class AuthCredential(BaseModelWithConfig):
   Example: Auth with resource reference
   AuthCredential(
       auth_type=AuthCredentialTypes.API_KEY,
-      resource_ref="projects/1234/locations/us-central1/resources/resource1",
+      resource_ref="projects/YOUR_PROJECT_ID/locations/us-central1/resources/YOUR_RESOURCE_ID",
   )
   """