diff --git a/src/google/adk/tools/bigquery/bigquery_credentials.py b/src/google/adk/tools/bigquery/bigquery_credentials.py
index 27c3a786..0a99136c 100644
--- a/src/google/adk/tools/bigquery/bigquery_credentials.py
+++ b/src/google/adk/tools/bigquery/bigquery_credentials.py
@@ -31,12 +31,14 @@ from ...auth.auth_credential import AuthCredential
 from ...auth.auth_credential import AuthCredentialTypes
 from ...auth.auth_credential import OAuth2Auth
 from ...auth.auth_tool import AuthConfig
+from ...utils.feature_decorator import experimental
 from ..tool_context import ToolContext
 
 BIGQUERY_TOKEN_CACHE_KEY = "bigquery_token_cache"
 BIGQUERY_DEFAULT_SCOPE = ["https://www.googleapis.com/auth/bigquery"]
 
 
+@experimental
 class BigQueryCredentialsConfig(BaseModel):
   """Configuration for Google API tools. (Experimental)"""
 
diff --git a/src/google/adk/tools/bigquery/bigquery_tool.py b/src/google/adk/tools/bigquery/bigquery_tool.py
index 55301220..18273418 100644
--- a/src/google/adk/tools/bigquery/bigquery_tool.py
+++ b/src/google/adk/tools/bigquery/bigquery_tool.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import annotations
 
 import inspect
 from typing import Any
@@ -21,6 +22,7 @@ from typing import Optional
 from google.oauth2.credentials import Credentials
 from typing_extensions import override
 
+from ...utils.feature_decorator import experimental
 from ..function_tool import FunctionTool
 from ..tool_context import ToolContext
 from .bigquery_credentials import BigQueryCredentialsConfig
@@ -28,6 +30,7 @@ from .bigquery_credentials import BigQueryCredentialsManager
 from .config import BigQueryToolConfig
 
 
+@experimental
 class BigQueryTool(FunctionTool):
   """GoogleApiTool class for tools that call Google APIs.
 
diff --git a/src/google/adk/tools/bigquery/bigquery_toolset.py b/src/google/adk/tools/bigquery/bigquery_toolset.py
index 5543d103..313cf499 100644
--- a/src/google/adk/tools/bigquery/bigquery_toolset.py
+++ b/src/google/adk/tools/bigquery/bigquery_toolset.py
@@ -26,11 +26,13 @@ from . import query_tool
 from ...tools.base_tool import BaseTool
 from ...tools.base_toolset import BaseToolset
 from ...tools.base_toolset import ToolPredicate
+from ...utils.feature_decorator import experimental
 from .bigquery_credentials import BigQueryCredentialsConfig
 from .bigquery_tool import BigQueryTool
 from .config import BigQueryToolConfig
 
 
+@experimental
 class BigQueryToolset(BaseToolset):
   """BigQuery Toolset contains tools for interacting with BigQuery data and metadata."""