diff --git a/openapi/openapiv2.json b/openapi/openapiv2.json
index 6bcb9e60..1a58b592 100644
--- a/openapi/openapiv2.json
+++ b/openapi/openapiv2.json
@@ -1706,7 +1706,7 @@
     "/api/v1/namespaces/{namespace}/workflows/execute-multi-operation": {
       "post": {
         "summary": "ExecuteMultiOperation executes multiple operations within a single workflow.",
-        "description": "Operations are started atomically, meaning if *any* operation fails to be started, none are,\nand the request fails. Upon start, the API returns only when *all* operations have a response.\n\nUpon failure, the status code equals the status code of the *first* operation that failed to be started; and the\nlist of details contains one `google.grpc.Status` for each requested operation. The failed\noperation(s) have the same error details as if it was executed separately. All other operations have the\nstatus code `Aborted` and `temporal.api.failure.v1.MultiOperationExecutionAborted` is added to the details field.\n\nNOTE: Experimental API.",
+        "description": "Operations are started atomically, meaning if *any* operation fails to be started, none are,\nand the request fails. Upon start, the API returns only when *all* operations have a response.\n\nUpon failure, it returns `MultiOperationExecutionFailure` where the status code\nequals the status code of the *first* operation that failed to be started.\n\nNOTE: Experimental API.",
         "operationId": "ExecuteMultiOperation",
         "responses": {
           "200": {
diff --git a/openapi/openapiv3.yaml b/openapi/openapiv3.yaml
index 0a8ed500..003e81f8 100644
--- a/openapi/openapiv3.yaml
+++ b/openapi/openapiv3.yaml
@@ -1469,10 +1469,8 @@ paths:
          Operations are started atomically, meaning if *any* operation fails to be started, none are,
          and the request fails. Upon start, the API returns only when *all* operations have a response.
 
-         Upon failure, the status code equals the status code of the *first* operation that failed to be started; and the
-         list of details contains one `google.grpc.Status` for each requested operation. The failed
-         operation(s) have the same error details as if it was executed separately. All other operations have the
-         status code `Aborted` and `temporal.api.failure.v1.MultiOperationExecutionAborted` is added to the details field.
+         Upon failure, it returns `MultiOperationExecutionFailure` where the status code
+         equals the status code of the *first* operation that failed to be started.
 
          NOTE: Experimental API.
       operationId: ExecuteMultiOperation
diff --git a/temporal/api/common/v1/message.proto b/temporal/api/common/v1/message.proto
index f0ec5676..7f04641f 100644
--- a/temporal/api/common/v1/message.proto
+++ b/temporal/api/common/v1/message.proto
@@ -191,4 +191,4 @@ message Callback {
     oneof variant {
         Nexus nexus = 2;
     }
-}
+}
\ No newline at end of file
diff --git a/temporal/api/errordetails/v1/message.proto b/temporal/api/errordetails/v1/message.proto
index ab86baa6..7d490133 100644
--- a/temporal/api/errordetails/v1/message.proto
+++ b/temporal/api/errordetails/v1/message.proto
@@ -34,6 +34,7 @@ option java_outer_classname = "MessageProto";
 option ruby_package = "Temporalio::Api::ErrorDetails::V1";
 option csharp_namespace = "Temporalio.Api.ErrorDetails.V1";
 
+import "google/protobuf/any.proto";
 import "temporal/api/common/v1/message.proto";
 
 import "temporal/api/enums/v1/failed_cause.proto";
@@ -112,3 +113,21 @@ message NewerBuildExistsFailure {
     // The current default compatible build ID which will receive tasks
     string default_build_id = 1;
 }
+
+message MultiOperationExecutionFailure {
+    // One status for each requested operation from the failed MultiOperation. The failed
+    // operation(s) have the same error details as if it was executed separately. All other operations have the
+    // status code `Aborted` and `MultiOperationExecutionAborted` is added to the details field.
+    repeated OperationStatus statuses = 1;
+
+    // NOTE: `OperationStatus` is modelled after
+    // [`google.rpc.Status`](https://github.com/googleapis/googleapis/blob/master/google/rpc/status.proto).
+    //
+    // (-- api-linter: core::0146::any=disabled
+    //     aip.dev/not-precedent: details are meant to hold arbitrary payloads. --)
+    message OperationStatus {
+        int32 code = 1;
+        string message = 2;
+        repeated google.protobuf.Any details = 3;
+    }
+}
\ No newline at end of file
diff --git a/temporal/api/workflowservice/v1/service.proto b/temporal/api/workflowservice/v1/service.proto
index 687baf7b..ddf39476 100644
--- a/temporal/api/workflowservice/v1/service.proto
+++ b/temporal/api/workflowservice/v1/service.proto
@@ -112,10 +112,8 @@ service WorkflowService {
     // Operations are started atomically, meaning if *any* operation fails to be started, none are,
     // and the request fails. Upon start, the API returns only when *all* operations have a response.
     //
-    // Upon failure, the status code equals the status code of the *first* operation that failed to be started; and the
-    // list of details contains one `google.grpc.Status` for each requested operation. The failed
-    // operation(s) have the same error details as if it was executed separately. All other operations have the
-    // status code `Aborted` and `temporal.api.failure.v1.MultiOperationExecutionAborted` is added to the details field.
+    // Upon failure, it returns `MultiOperationExecutionFailure` where the status code
+    // equals the status code of the *first* operation that failed to be started.
     //
     // NOTE: Experimental API.
     rpc ExecuteMultiOperation (ExecuteMultiOperationRequest) returns (ExecuteMultiOperationResponse) {