You can get to the Context Values using a script. If you have a list of Context Values that you can interate through then it would be easy to populate a data grid. Extracting those values from the InteractionXml is a more advanced topic, so for now just create a pipe delimited string with the property names you want and use StringUtils to split it into a list. Once you have the list, use the following script to get the values.
Add a reference to OpenSpan.Interactions.Controls.dll: