Index: ChapterX.Application/Comment/Commands/AddRequest.cs
===================================================================
--- ChapterX.Application/Comment/Commands/AddRequest.cs	(revision 877c13c3dd0934c1d31da7988d0d2c2c5925ed55)
+++ ChapterX.Application/Comment/Commands/AddRequest.cs	(revision 3ae4bab8dcf6c40690ba2765146e7e1f70fa3a2f)
@@ -1,6 +1,11 @@
 using MediatR;
+using System.ComponentModel.DataAnnotations;
 
 namespace ChapterX.Application.Comment.Commands
 {
-    public record AddRequest(string Content, int UserId, int StoryId) : IRequest<AddResponse>;
+    public record AddRequest(
+        [Required][MaxLength(2000)] string Content,
+        int UserId,
+        int StoryId
+    ) : IRequest<AddResponse>;
 }