minor doc fixes to utilization

Author: sanfilip

lib/machines/utilization.js

@@ -6,8 +6,9 @@ var assign = require('lodash.assign');
 /**
  * @memberof machines
  * @method utilization
- * @description Show machine utilization data for the machine with the given id. Machine upgrades are not represented in utilization data.
- * @param {string} params.machineId - Id of the machine to show
+ * @description Get machine utilization data for the machine with the given id. Machine upgrades are not represented in utilization data.
+ * @param {object} params - Machine utilization parameters
+ * @param {string} params.machineId - Id of the machine to get utilization data for
  * @param {string} params.billingMonth - Billing period to query in `YYYY-MM` format
  * @param {function} cb - Node-style error-first callback function
  * @returns {object} machine - The utilization JSON object