$response not available in http request tool

This is a question about the http request tool. NOT the http request node. I have noticed that in the http request tool that when configuring the pagination option, that there isn’t a variable of $response when defining an expression using the “response contains next URL” mode.

I don’t have this problem when configuring the http request node. Is this expected behavior? If so, then why include the pagination option in the tool if it’s not functional. If not, what am I missing. The documentation is lacking.

I am using version 4.2 (latest) of the http request tool.

thanks

John