describe feature type - Custom DescribeFeatureType response in Geoserver?

I'm using Geoserver in my web application. I need custom DescribeFeatureType response. What this mean?
layer_a is a layer in Geoserver. It have Feature Type Details as follow:

DiscribeFeatureType request for this layer, return a response as follow:

                xmlns:opengeo="http://opengeo.org" 
              xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
              elementFormDefault="qualified" 
              targetNamespace="http://opengeo.org">
                schemaLocation="http://localhost:8080/geoserver/schemas/gml/3.1.1/base/gml.xsd"/>


  
    
      
        
          
          
          
          
          
          

        
      
    
  
  

I want to get more description for some fields. For example, for SQKM row, I want to get some extra description such as: minValue, maxValue and etc.

Is it possible? If yes, HOW?

A suggestion: We can put our data in column comment of table and then define a db datastore in geoserver. So we can response comment of table with describeFeatureType?