Merge "Add description to policies in used_limits"

nova/policies/used_limits.py

@@ -26,9 +26,22 @@ used_limits_policies = [
     policy.RuleDefault(
         name=POLICY_ROOT % 'discoverable',
         check_str=base.RULE_ANY),
-    policy.RuleDefault(
-        name=BASE_POLICY_NAME,
-        check_str=base.RULE_ADMIN_API),
+    # TODO(aunnam): Remove this rule after we seperate the scope check from
+    # policies, as this is only checking the scope.
+    base.create_rule_default(
+        BASE_POLICY_NAME,
+        base.RULE_ADMIN_API,
+        """Shows rate and absolute limits for the project.
+
+This policy only checks if the user has access to the requested
+project limits. And this check is performed only after the check
+os_compute_api:limits passes""",
+        [
+            {
+                'method': 'GET',
+                'path': '/limits'
+            }
+        ]),
 ]