diff --git a/keystoneclient/v3/ec2.py b/keystoneclient/v3/ec2.py
index 038406b4a..06fac20cd 100644
--- a/keystoneclient/v3/ec2.py
+++ b/keystoneclient/v3/ec2.py
@@ -14,6 +14,14 @@ from keystoneclient import base
 
 
 class EC2(base.Resource):
+    """Represents an EC2 resource.
+
+    Attributes:
+        * id: a string that identifies the EC2 resource.
+        * user_id: the ID field of a pre-existing user in the backend.
+        * project_id: the ID field of a pre-existing project in the backend.
+
+    """
 
     def __repr__(self):
         """Return string representation of EC2 resource information."""
@@ -25,9 +33,16 @@ class EC2Manager(base.ManagerWithFind):
     resource_class = EC2
 
     def create(self, user_id, project_id):
-        """Create a new access/secret pair for the user/project pair.
+        """Create a new access/secret pair.
+
+        :param user_id: the ID of the user having access/secret pair.
+        :type user_id: str or :class:`keystoneclient.v3.users.User`
+        :param project_id: the ID of the project having access/secret pair.
+        :type project_id: str or :class:`keystoneclient.v3.projects.Project`
+
+        :returns: the created access/secret pair returned from server.
+        :rtype: :class:`keystoneclient.v3.ec2.EC2`
 
-        :rtype: object of type :class:`EC2`
         """
         # NOTE(jamielennox): Yes, this uses tenant_id as a key even though we
         # are in the v3 API.
@@ -35,23 +50,49 @@ class EC2Manager(base.ManagerWithFind):
                           body={'tenant_id': project_id},
                           response_key="credential")
 
-    def list(self, user_id):
-        """Get a list of access/secret pairs for a user_id.
-
-        :rtype: list of :class:`EC2`
-        """
-        return self._list("/users/%s/credentials/OS-EC2" % user_id,
-                          response_key="credentials")
-
     def get(self, user_id, access):
-        """Get the access/secret pair for a given access key.
+        """Retrieve an access/secret pair for a given access key.
+
+        :param user_id: the ID of the user whose access/secret pair will be
+                        retrieved from the server.
+        :type user_id: str or :class:`keystoneclient.v3.users.User`
+        :param access: the access key whose access/secret pair will be
+                       retrieved from the server.
+        :type access: str or :class:`keystoneclient.v3.ec2.EC2`
+
+        :returns: the specified access/secret pair returned from server.
+        :rtype: :class:`keystoneclient.v3.ec2.EC2`
 
-        :rtype: object of type :class:`EC2`
         """
         url = "/users/%s/credentials/OS-EC2/%s" % (user_id, base.getid(access))
         return self._get(url, response_key="credential")
 
+    def list(self, user_id):
+        """List access/secret pairs for a given user.
+
+        :param str user_id: the ID of the user having access/secret pairs will
+                            be listed.
+
+        :returns: a list of access/secret pairs.
+        :rtype: list of :class:`keystoneclient.v3.ec2.EC2`
+
+        """
+        return self._list("/users/%s/credentials/OS-EC2" % user_id,
+                          response_key="credentials")
+
     def delete(self, user_id, access):
-        """Delete an access/secret pair for a user."""
+        """Delete an access/secret pair.
+
+        :param user_id: the ID of the user whose access/secret pair will be
+                        deleted on the server.
+        :type user_id: str or :class:`keystoneclient.v3.users.User`
+        :param access: the access key whose access/secret pair will be deleted
+                       on the server.
+        :type access: str or :class:`keystoneclient.v3.ec2.EC2`
+
+        :returns: Response object with 204 status.
+        :rtype: :class:`requests.models.Response`
+
+        """
         return self._delete("/users/%s/credentials/OS-EC2/%s" %
                             (user_id, base.getid(access)))