Assign additional attributes to types like int, float for reflection purposes

I am trying to automate the display (gathering via reflection) of my variables which are located in specific scripts in Unity. The trouble is assigning custom values (for example: "string DisplayName", "bool DisplayMe", "bool WriteMe" etc.). When it comes to my custom classes I understand how I would do it, but I would like to avoid remaking types like float, string, int etc. for this purpose.

For example, let's say I have:

public class myBaseClass
{
    public string Name = "Display Name";
    public bool AmReadable = true;
    public bool AmWritable = true;
}

Then:

public class myDoubleFloat: myBaseClass
{
    public float ValueFirst;
    public float ValueSecond;
}

So in some scripts in Unity I define it:

public class SomeScriptOnGameObject : MonoBehaviour
{
    public myDoubleFloat myFirstVariable{get; set;}
    public float mySecondVariable{get; set;}
}

So later on with reflection I can check whether "myFirstVariable" should be read, it's display name etc. - while for "mySecondVariable" I cannot perform this check. How do I go about this without reinventing the wheel and making a class for each of these types like float, string, int, List etc.?