Is it possible to have the observer rules trigger with details/content of a note that was added?

What I'd like to do is have the system trigger when a note is added to a ticket that contains something specific within the note, such as:

"Can you please pull a call for me?"

Would trigger the observer rule to add a tag to the ticket.  

Here's an example, except I would want the "description" to be the body of the note, not the main ticket description.

Currently it only seems to be able to pick up on the main description aka the body of the ticket.  Not the content of the note.  This would be SO helpful for our team to automate things instead of needing to manually add a tag or use a scenario automation.