Something missing or incorrect in Docs Agent instructdions

### Description of the bug:

1. Go to [step 3](https://developers.google.com/oauthplayground/).
2. Step 3.3 says run `gcloud auth` in the directory with your `client_secret.json`. A url is printed to the screen.
3. Paste the URL in a browser.

### Actual vs expected behavior:

I'm supposed to get a log-in sequences. Instead I get, "Access blocked: This app’s request is invalid" and:

You can’t sign in because this app sent an invalid request. You can try again later, or contact the developer about this issue.
If you are a developer of this app, see [error details](https://accounts.google.com/).
Error 400: redirect_uri_mismatch

And 'error details' simply repeats, "Error 400: redirect_uri_mismatch"

### Any other information you'd like to share?

_No response_