diff --git a/lib/actions/actions.js b/lib/actions/actions.js
index 2c0de1a3..d616af77 100644
--- a/lib/actions/actions.js
+++ b/lib/actions/actions.js
@@ -71,8 +71,8 @@ actions._prepCopy = function _prepCopy(source, destination, process) {
  * `copy`, `template` (only when could be applied/required by legacy code),
  * `write` and alike consider.
  *
- * @param {String} source
- * @param {String} destination
+ * @param {String} source      Source file to copy from. Relative to this.sourceRoot()
+ * @param {String} destination Destination file to write to. Relative to this.destinationRoot()
  * @param {Function} process
  */
 
@@ -124,11 +124,12 @@ actions.copy = function copy(source, destination, process) {
  * https://github.com/yeoman/generator/pull/359
  * https://github.com/yeoman/generator/issues/350
  *
- * An optimized copy method for larger file trees.  Does not do
- * full conflicter checks, only check ir root directory is not empty.
+ * A copy method skiping templating and conflict checking. It will allow copying
+ * a large amount of files without causing too much recursion errors. You should
+ * never use this method, unless there's no other solution. 
  *
- * @param {String} source
- * @param {String} destination
+ * @param {String} source      Source file to copy from. Relative to this.sourceRoot()
+ * @param {String} destination Destination file to write to. Relative to this.destinationRoot()
  * @param {Function} process
  */
 
@@ -163,7 +164,7 @@ actions.bulkCopy = function bulkCopy(source, destination, process) {
  * encoding or null. Non absolute path are prefixed by the source root.
  *
  * @param {String} filepath
- * @param {String} encoding
+ * @param {String} [encoding="utf-8"] Character encoding.
  */
 
 actions.read = function read(filepath, encoding) {
@@ -269,10 +270,10 @@ actions.checkForCollision = function checkForCollision(filepath, content, cb) {
  *
  * use options to pass parameters to engine (like _.templateSettings)
  *
- * @param {String} source
- * @param {String} destination
- * @param {Object} data
- * @param {Object} options
+ * @param {String} source      Source file to read from. Relative to this.sourceRoot()
+ * @param {String} destination Destination file to write to. Relative to this.destinationRoot().
+ * @param {Object} data        Hash to pass to the template. Leave undefined to use the generator instance context.
+ * @param {Object} options 
  */
 
 actions.template = function template(source, destination, data, options) {
@@ -345,8 +346,8 @@ actions._directory = function _directory(source, destination, process, bulk) {
 /**
  * Copies recursively the files from source directory to root directory.
  *
- * @param {String} source
- * @param {String} destination
+ * @param {String} source      Source directory to copy from. Relative to this.sourceRoot()
+ * @param {String} destination Directory to copy the source files into. Relative to this.destinationRoot().
  * @param {Function} process
  */
 
@@ -357,8 +358,12 @@ actions.directory = function directory(source, destination, process) {
 /**
  * Copies recursively the files from source directory to root directory.
  *
- * @param {String} source
- * @param {String} destination
+ * A copy method skiping templating and conflict checking. It will allow copying
+ * a large amount of files without causing too much recursion errors. You should
+ * never use this method, unless there's no other solution. 
+ *
+ * @param {String} source      Source directory to copy from. Relative to this.sourceRoot()
+ * @param {String} destination Directory to copy the source files into.Relative to this.destinationRoot().
  * @param {Function} process
  */