Merge "Add API reference for metering_label_rules_client"
diff --git a/tempest/lib/services/network/metering_label_rules_client.py b/tempest/lib/services/network/metering_label_rules_client.py
index 8ccabee..dd5fd52 100644
--- a/tempest/lib/services/network/metering_label_rules_client.py
+++ b/tempest/lib/services/network/metering_label_rules_client.py
@@ -27,10 +27,17 @@
         return self.create_resource(uri, post_data)
 
     def show_metering_label_rule(self, metering_label_rule_id, **fields):
+        """Show metering label rule.
+
+        For a full list of available parameters, please refer to the official
+        API reference:
+        https://docs.openstack.org/api-ref/network/v2/index.html#show-metering-label-rule-details
+        """
         uri = '/metering/metering-label-rules/%s' % metering_label_rule_id
         return self.show_resource(uri, **fields)
 
     def delete_metering_label_rule(self, metering_label_rule_id):
+        """Delete metering label rule."""
         uri = '/metering/metering-label-rules/%s' % metering_label_rule_id
         return self.delete_resource(uri)