Lil yellow square inside an agent?

I embarrassed that I don’t know how to even phrase this question or apparently, given 10 minutes of searching with no hits, know how to search for an answer.

Inside an agent, you have the agent “navigator”, right? Showing Options, Initialize, etc. Well it also shows any functions you define. I have a function that is showing up, no errors (apparently) but the agent ain’t working, and the function in that navigator I just mentioned is showing a round, blue F (as per normal) but it has a lil yellow square on it that I’ve never seen before.

Anyone know what that yellow square indicates?

Subject: Private function

If it’s not meant to be private then that might be your problem

Subject: Thanks!

That were it! Thank you!

Subject: this is what the yellow box looks like:

left hand side, that yellow square over top the blue circle. Any idea what it means?