There is a possibility to add Minimum/Maximum length validation in Kendo editor , but is is not user friendly. I am referring to method describe on the following website:

ASP.NET MVC Editor Component Add maxlength Validations - Telerik UI for ASP.NET MVC

What I am looking for would be easier way just by adding some attribute so the code should be like the following:

    @(Html.Kendo().Editor()
          .Name("editor")
          .HtmlAttributes(new { style = "width: 100%; height:840px", aria_label = "editor" })
           .MinLenght(10)
           .MaxLength(5000)            

          )
 
In this case, when you add the one which I added as Red it should automatically enforce it and do validation based on number of characters.