What problem does this address?

Adding media from one's media library is a rote and common action in the block editor. Currently to do so from the inserter panel it takes 4 clicks:

• One to open the panel
• One to select the "media" tab
• One to choose the media source ("library", "openverse", and so on)
• One to insert the media

This is a somewhat tedious flow with low discoverability.

What is your proposed solution?

This feels like an appropriate use of the Editor Command Palette, which could contain a unique command for each media source:

• Insert image from media library
• Insert image from Openverse
• Insert image from Pexels

The language "Insert" is probably not ideal, because these actions would merely be opening the appropriate media tab in the inserter panel. I'm not a copywriter, though 😊

As a prerequisite, there is not yet a command to "Toggle block inserter". It might make sense for that command to exist before what are essentially "sub commands" within the inserter exist.