The tool takes a config in a format (see the InputConfig.xml file) and checks a price of that item on the url you provided. Important note is that you need to have mailjet smtp account set up with private and public key added preferably to your host machine system variables under names PUBLIC_KEY_PARSERTOOL and PRIVATE_KEY_PARSERTOOL respectively.
The outcome of the tool is an email sent with a table that gives you your target price, the actual price and information wether the pricegoal was hit. If there was a problem with the value parsing that is also represented in the mail.