diff --git a/senlinclient/plugin.py b/senlinclient/plugin.py
index 66002bbd..925a19c8 100644
--- a/senlinclient/plugin.py
+++ b/senlinclient/plugin.py
@@ -10,6 +10,8 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+"""OpenStackClient plugin for Clustering service."""
+
 import logging
 
 from openstack import connection