You click on a banner ad inside an app, and if you have Intent Intercept installed, it won't immediately register as an "impression" and take you to wherever the banner has been programmed to take you to by default. Since Intent Intercept also affects the ad industry(of which Google is a big part), I don't expect Google to build a similar less-nerdy tool into Android by default.
> Installing random tools to hopefully get more security, though is risky also. Hopefully that tool doesn’t get compromised as it is privy to all intent activity.
Intent Intercept is open source(Apache License 2.0 https://github.com/k3b/intent-intercept) and its release binaries are hosted on F-Droid, arguably the most trusted Android "store" for Free and Open Source apps. So I'm not too worried.