diff --git a/output/openapi/elasticsearch-openapi.json b/output/openapi/elasticsearch-openapi.json
index 3143ff6379..d8cdf98c9b 100644
--- a/output/openapi/elasticsearch-openapi.json
+++ b/output/openapi/elasticsearch-openapi.json
@@ -15635,7 +15635,7 @@
           "indices"
         ],
         "summary": "Check index templates",
-        "description": "Check whether index templates exist.",
+        "description": "Check whether index templates exist.\n\n## Required authorization\n\n* Cluster privileges: `manage_index_templates`\n",
         "operationId": "indices-exists-index-template",
         "parameters": [
           {
diff --git a/output/openapi/elasticsearch-serverless-openapi.json b/output/openapi/elasticsearch-serverless-openapi.json
index 642b993ae7..7f2fec3fdb 100644
--- a/output/openapi/elasticsearch-serverless-openapi.json
+++ b/output/openapi/elasticsearch-serverless-openapi.json
@@ -8361,7 +8361,7 @@
           "indices"
         ],
         "summary": "Check index templates",
-        "description": "Check whether index templates exist.",
+        "description": "Check whether index templates exist.\n\n## Required authorization\n\n* Cluster privileges: `manage_index_templates`\n",
         "operationId": "indices-exists-index-template",
         "parameters": [
           {
diff --git a/output/schema/schema.json b/output/schema/schema.json
index bfff8e6cfc..cf27c25430 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -7337,6 +7337,11 @@
       "docId": "index-templates-exist",
       "docUrl": "https://www.elastic.co/docs/api/doc/elasticsearch/v9/operation/operation-indices-exists-index-template",
       "name": "indices.exists_index_template",
+      "privileges": {
+        "cluster": [
+          "manage_index_templates"
+        ]
+      },
       "request": {
         "name": "Request",
         "namespace": "indices.exists_index_template"
@@ -150409,7 +150414,7 @@
           }
         }
       ],
-      "specLocation": "indices/exists_index_template/IndicesExistsIndexTemplateRequest.ts#L24-L61"
+      "specLocation": "indices/exists_index_template/IndicesExistsIndexTemplateRequest.ts#L24-L62"
     },
     {
       "kind": "response",
diff --git a/output/schema/validation-errors.json b/output/schema/validation-errors.json
index 9e0795aa23..7ef79abf8c 100644
--- a/output/schema/validation-errors.json
+++ b/output/schema/validation-errors.json
@@ -41,12 +41,6 @@
       ],
       "response": []
     },
-    "search_mvt": {
-      "request": [
-        "Request: query parameter 'grid_agg' does not exist in the json spec"
-      ],
-      "response": []
-    },
     "searchable_snapshots.clear_cache": {
       "request": [
         "Request: missing json spec query parameter 'index'"
diff --git a/specification/_json_spec/search_mvt.json b/specification/_json_spec/search_mvt.json
index 9dc7676d73..36a98c3fd3 100644
--- a/specification/_json_spec/search_mvt.json
+++ b/specification/_json_spec/search_mvt.json
@@ -62,6 +62,12 @@
         "description": "Determines the geometry type for features in the aggs layer.",
         "default": "grid"
       },
+      "grid_agg": {
+        "type": "enum",
+        "options": ["geotile", "geohex"],
+        "description": "Aggregation used to create a grid for `field`.",
+        "default": "geotile"
+      },
       "size": {
         "type": "int",
         "description": "Maximum number of features to return in the hits layer. Accepts 0-10000.",