You need to edit the alert, go into the Trigger actions, edit the action you have and put content into the email. This is the default text that's put into the email action. You need to remove it and add in the values you want. There is a variable builder that will allow you to add the information you wish to see. Some examples would be
${NodeName}
${Status}
${IP_Address}
The information is pre populated in the action, you have to customize it. Otherwise you end up wit the verbiage you are receiving.