Fix Synopsis/Description mix-up

src/Discord.Net.Commands/Attributes/DescriptionAttribute.cs

@@ -2,8 +2,8 @@
 
 namespace Discord.Commands
 {
-    // Full summary of method/parameter
-    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Parameter)]
+    // Full summary of method
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class)]
     public class DescriptionAttribute : Attribute
     {
         public string Text { get; }
@@ -13,8 +13,8 @@ namespace Discord.Commands
         }
     }
 
-    // Brief summary of method/module
-    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class)]
+    // Brief summary of method/module/parameter
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class | AttributeTargets.Parameter)]
     public class SynopsisAttribute : Attribute
     {
         public string Text { get; }

src/Discord.Net.Commands/Module.cs

@@ -10,6 +10,7 @@ namespace Discord.Commands
         public CommandService Service { get; }
         public string Name { get; }
         public string Synopsis { get; }
+        public string Description { get; }
         public IEnumerable<Command> Commands { get; }
         internal object Instance { get; }
 
@@ -23,6 +24,10 @@ namespace Discord.Commands
             if (synopsisAttr != null)
                 Synopsis = synopsisAttr.Text;
 
+            var descriptionAttr = typeInfo.GetCustomAttribute<DescriptionAttribute>();
+            if (descriptionAttr != null)
+                Description = descriptionAttr.Text;
+
             List<Command> commands = new List<Command>();
             SearchClass(instance, commands, typeInfo, moduleAttr.Prefix ?? "");
             Commands = commands;