Customize label for default _execute_action in Chrome extension

Question

My Chrome extension executes a single function, which the user can bind to a keyboard shortcut by visiting chrome://extensions/shortcuts.

I want to customize the description of the action, which currently says "Activate the extension" by default.

I know I can add my own custom command, but then I end up with two items (as shown below), one that says "Activate the extension" and one that says "My Custom Command". I just want one item that says "My Custom Command" instead of saying "Activate the extension".

Or equivalently, how can I remove the "Activate the extension" item?

To produce the screenshot above, I added this in manifest.json:

  "commands": {
    "my-custom-command": {
      "description": "My Custom Command"
    }
  }