JSDoc fixes

lib/models/model.js

@@ -136,13 +136,11 @@ Model._ACL = function getACL(ACL) {
  * Check if the given access token can invoke the method
  *
  * @param {AccessToken} token The access token
- * @param {*} modelId The model id
- * @param {SharedMethod} sharedMethod
- * @param callback The callback function
- *
- * @callback {Function} callback
+ * @param {*} modelId The model ID.
+ * @param {SharedMethod} sharedMethod The method in question
+ * @callback {Function} callback The callback function
  * @param {String|Error} err The error object
- * @param {Boolean} allowed is the request allowed
+ * @param {Boolean} allowed True if the request is allowed; false otherwise.
  */
 Model.checkAccess = function(token, modelId, sharedMethod, callback) {
   var ANONYMOUS = require('./access-token').ANONYMOUS;