diff --git a/output/openapi/elasticsearch-openapi.json b/output/openapi/elasticsearch-openapi.json
index e55cff53d4..d706cdfe31 100644
--- a/output/openapi/elasticsearch-openapi.json
+++ b/output/openapi/elasticsearch-openapi.json
@@ -10585,7 +10585,7 @@
                     }
                   },
                   "include_ccs_metadata": {
-                    "description": "When set to `true` and performing a cross-cluster query, the response will include an extra `_clusters`\nobject with information about the clusters that participated in the search along with info such as shards\ncount.",
+                    "description": "When set to `true` and performing a cross-cluster/cross-project query, the response will include an extra `_clusters`\nobject with information about the clusters that participated in the search along with info such as shards\ncount.",
                     "default": false,
                     "type": "boolean"
                   },
@@ -11057,7 +11057,7 @@
                     }
                   },
                   "include_ccs_metadata": {
-                    "description": "When set to `true` and performing a cross-cluster query, the response will include an extra `_clusters`\nobject with information about the clusters that participated in the search along with info such as shards\ncount.",
+                    "description": "When set to `true` and performing a cross-cluster/cross-project query, the response will include an extra `_clusters`\nobject with information about the clusters that participated in the search along with info such as shards\ncount.",
                     "default": false,
                     "type": "boolean"
                   }
diff --git a/output/openapi/elasticsearch-serverless-openapi.json b/output/openapi/elasticsearch-serverless-openapi.json
index 31ee8671e9..02cb30a7a4 100644
--- a/output/openapi/elasticsearch-serverless-openapi.json
+++ b/output/openapi/elasticsearch-serverless-openapi.json
@@ -6509,7 +6509,7 @@
                     }
                   },
                   "include_ccs_metadata": {
-                    "description": "When set to `true` and performing a cross-cluster query, the response will include an extra `_clusters`\nobject with information about the clusters that participated in the search along with info such as shards\ncount.",
+                    "description": "When set to `true` and performing a cross-cluster/cross-project query, the response will include an extra `_clusters`\nobject with information about the clusters that participated in the search along with info such as shards\ncount.",
                     "default": false,
                     "type": "boolean"
                   }
diff --git a/output/schema/schema.json b/output/schema/schema.json
index 59afa0a176..fca0f8cd9a 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -140018,7 +140018,10 @@
             }
           },
           {
-            "description": "When set to `true` and performing a cross-cluster query, the response will include an extra `_clusters`\nobject with information about the clusters that participated in the search along with info such as shards\ncount.",
+            "aliases": [
+              "include_execution_metadata"
+            ],
+            "description": "When set to `true` and performing a cross-cluster/cross-project query, the response will include an extra `_clusters`\nobject with information about the clusters that participated in the search along with info such as shards\ncount.",
             "name": "include_ccs_metadata",
             "required": false,
             "serverDefault": false,
@@ -140163,7 +140166,7 @@
           }
         }
       ],
-      "specLocation": "esql/async_query/AsyncQueryRequest.ts#L28-L138"
+      "specLocation": "esql/async_query/AsyncQueryRequest.ts#L28-L139"
     },
     {
       "kind": "response",
@@ -140865,7 +140868,10 @@
             }
           },
           {
-            "description": "When set to `true` and performing a cross-cluster query, the response will include an extra `_clusters`\nobject with information about the clusters that participated in the search along with info such as shards\ncount.",
+            "aliases": [
+              "include_execution_metadata"
+            ],
+            "description": "When set to `true` and performing a cross-cluster/cross-project query, the response will include an extra `_clusters`\nobject with information about the clusters that participated in the search along with info such as shards\ncount.",
             "name": "include_ccs_metadata",
             "required": false,
             "serverDefault": false,
@@ -140972,7 +140978,7 @@
           }
         }
       ],
-      "specLocation": "esql/query/QueryRequest.ts#L27-L115"
+      "specLocation": "esql/query/QueryRequest.ts#L27-L116"
     },
     {
       "kind": "response",
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index e8eb40bc37..902e7599a1 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -11117,6 +11117,7 @@ export interface EsqlAsyncQueryRequest extends RequestBase {
     query: string
     tables?: Record<string, Record<string, EsqlTableValuesContainer>>
     include_ccs_metadata?: boolean
+    include_execution_metadata?: boolean
     wait_for_completion_timeout?: Duration
     keep_alive?: Duration
     keep_on_completion?: boolean
@@ -11191,6 +11192,7 @@ export interface EsqlQueryRequest extends RequestBase {
     query: string
     tables?: Record<string, Record<string, EsqlTableValuesContainer>>
     include_ccs_metadata?: boolean
+    include_execution_metadata?: boolean
   }
 }
 
diff --git a/specification/esql/async_query/AsyncQueryRequest.ts b/specification/esql/async_query/AsyncQueryRequest.ts
index 87709cef94..f3c360f625 100644
--- a/specification/esql/async_query/AsyncQueryRequest.ts
+++ b/specification/esql/async_query/AsyncQueryRequest.ts
@@ -106,10 +106,11 @@ export interface Request extends RequestBase {
      */
     tables?: Dictionary<string, Dictionary<string, TableValuesContainer>>
     /**
-     * When set to `true` and performing a cross-cluster query, the response will include an extra `_clusters`
+     * When set to `true` and performing a cross-cluster/cross-project query, the response will include an extra `_clusters`
      * object with information about the clusters that participated in the search along with info such as shards
      * count.
      * @server_default false
+     * @aliases include_execution_metadata
      */
     include_ccs_metadata?: boolean
     /**
diff --git a/specification/esql/query/QueryRequest.ts b/specification/esql/query/QueryRequest.ts
index 91004d2312..4d634e5187 100644
--- a/specification/esql/query/QueryRequest.ts
+++ b/specification/esql/query/QueryRequest.ts
@@ -105,10 +105,11 @@ export interface Request extends RequestBase {
      */
     tables?: Dictionary<string, Dictionary<string, TableValuesContainer>>
     /**
-     * When set to `true` and performing a cross-cluster query, the response will include an extra `_clusters`
+     * When set to `true` and performing a cross-cluster/cross-project query, the response will include an extra `_clusters`
      * object with information about the clusters that participated in the search along with info such as shards
      * count.
      * @server_default false
+     * @aliases include_execution_metadata
      */
     include_ccs_metadata?: boolean
   }