diff --git a/lib/vagrant/template_renderer.rb b/lib/vagrant/template_renderer.rb
index 88f1ed615..f81ecef5b 100644
--- a/lib/vagrant/template_renderer.rb
+++ b/lib/vagrant/template_renderer.rb
@@ -3,8 +3,14 @@ module Vagrant
   # `GEM_ROOT/templates` directory.
   class TemplateRenderer < OpenStruct
     class <<self
-      def render!(*args)
-        renderer = new(*args)
+      # Render a given template and return the result. This method optionally
+      # takes a block which will be passed the renderer prior to rendering, which
+      # allows the caller to set any view variables within the renderer itself.
+      #
+      # @param [String] template Name of the template file, without the extension
+      # @return [String] Rendered template
+      def render!(template, data={})
+        renderer = new(template, data)
         yield renderer if block_given?
         renderer.render
       end
@@ -19,6 +25,11 @@ module Vagrant
       end
     end
 
+    # Renders the template using the class intance as the binding. Because the
+    # renderer inherits from `OpenStruct`, additional view variables can be
+    # added like normal accessors.
+    #
+    # @return [String]
     def render
       result = nil
       File.open(full_template_path, 'r') do |f|
@@ -29,6 +40,10 @@ module Vagrant
       result
     end
 
+    # Returns the full path to the template, taking into accoun the gem directory
+    # and adding the `.erb` extension to the end.
+    #
+    # @return [String]
     def full_template_path
       File.join(PROJECT_ROOT, 'templates', "#{template}.erb")
     end