I've just been discovering this pattern too. It's made a huge difference. Trying to get Claude to remote control an app for testing via the various other means was miserable and unreliable.

I got it to build an MCP server into the app that supported sending commands to allow Claude to interact with it as if it was a user, including keypresses and grabbing screenshots, and the difference was immediate and really beneficial.

Visual issues were previously one of the things it would tend to struggle with.