diff --git a/apis/workflows/v1/workflows.proto b/apis/workflows/v1/workflows.proto
index b14d448..a126554 100644
--- a/apis/workflows/v1/workflows.proto
+++ b/apis/workflows/v1/workflows.proto
@@ -123,10 +123,15 @@ message UpdateWorkflowRequest {
     (buf.validate.field).string.min_len = 1,
     (buf.validate.field).string.max_len = 100
   ];
-  string description = 3 [
+  // Short text summary. Omit to leave unchanged, or set to empty to clear.
+  string summary = 4 [
     features.field_presence = EXPLICIT,
     (buf.validate.field).string.max_len = 50000
   ];
+  string description = 3 [
+    features.field_presence = EXPLICIT,
+    (buf.validate.field).string.max_len = 1000000
+  ];
 }
 
 // DeleteWorkflowRequest deletes an existing workflow.