diff --git a/x-pack/plugins/alerting/server/routes/rule/apis/mute_all/mute_all_rule.ts b/x-pack/plugins/alerting/server/routes/rule/apis/mute_all/mute_all_rule.ts
index 8ac77973575bb..e9aa0e42a046f 100644
--- a/x-pack/plugins/alerting/server/routes/rule/apis/mute_all/mute_all_rule.ts
+++ b/x-pack/plugins/alerting/server/routes/rule/apis/mute_all/mute_all_rule.ts
@@ -37,6 +37,15 @@ export const muteAllRuleRoute = (
           204: {
             description: 'Indicates a successful call.',
           },
+          400: {
+            description: 'Indicates an invalid schema or parameters.',
+          },
+          403: {
+            description: 'Indicates that this call is forbidden.',
+          },
+          404: {
+            description: 'Indicates a rule with the given ID does not exist.',
+          },
         },
       },
     },