diff --git a/x-pack/plugins/cases/docs/openapi/bundled.json b/x-pack/plugins/cases/docs/openapi/bundled.json
index 2aed6ef9f65f3..c3fef89e021dd 100644
--- a/x-pack/plugins/cases/docs/openapi/bundled.json
+++ b/x-pack/plugins/cases/docs/openapi/bundled.json
@@ -5471,7 +5471,8 @@
             "type": "array",
             "items": {
               "type": "string"
-            }
+            },
+            "maxItems": 1000
           }
         ],
         "x-technical-preview": true,
@@ -5488,7 +5489,8 @@
             "type": "array",
             "items": {
               "type": "string"
-            }
+            },
+            "maxItems": 1000
           }
         ],
         "x-technical-preview": true
diff --git a/x-pack/plugins/cases/docs/openapi/bundled.yaml b/x-pack/plugins/cases/docs/openapi/bundled.yaml
index 6c2bd225ced70..f818d279a2e27 100644
--- a/x-pack/plugins/cases/docs/openapi/bundled.yaml
+++ b/x-pack/plugins/cases/docs/openapi/bundled.yaml
@@ -3532,6 +3532,7 @@ components:
         - type: array
           items:
             type: string
+          maxItems: 1000
       x-technical-preview: true
       example: 6b24c4dc44bc720cfc92797f3d61fff952f2b2627db1fb4f8cc49f4530c4ff42
     alert_indices:
@@ -3543,6 +3544,7 @@ components:
         - type: array
           items:
             type: string
+          maxItems: 1000
       x-technical-preview: true
     rule:
       title: Alerting rule
diff --git a/x-pack/plugins/cases/docs/openapi/components/schemas/alert_identifiers.yaml b/x-pack/plugins/cases/docs/openapi/components/schemas/alert_identifiers.yaml
index ee31081efee12..0f56441b7ff90 100644
--- a/x-pack/plugins/cases/docs/openapi/components/schemas/alert_identifiers.yaml
+++ b/x-pack/plugins/cases/docs/openapi/components/schemas/alert_identifiers.yaml
@@ -11,5 +11,6 @@ oneOf:
   - type: array
     items:
       type: string
+    maxItems: 1000
 x-technical-preview: true
 example: 6b24c4dc44bc720cfc92797f3d61fff952f2b2627db1fb4f8cc49f4530c4ff42
\ No newline at end of file
diff --git a/x-pack/plugins/cases/docs/openapi/components/schemas/alert_indices.yaml b/x-pack/plugins/cases/docs/openapi/components/schemas/alert_indices.yaml
index 43463bf6eb5da..f82bb1762ee32 100644
--- a/x-pack/plugins/cases/docs/openapi/components/schemas/alert_indices.yaml
+++ b/x-pack/plugins/cases/docs/openapi/components/schemas/alert_indices.yaml
@@ -12,4 +12,5 @@ oneOf:
   - type: array
     items:
       type: string
+    maxItems: 1000
 x-technical-preview: true
\ No newline at end of file