I just tried "@gmail summarize my last 5 emails" and got:
> I don't have access to your Gmail account, so I can't summarize your last 5 emails. However, I can help you summarize your emails if you provide them to me.
You must enable Bard history for these features to work, and you must go to the extensions page and make sure they’re turned on. Arguing with a model that doesn’t have access to the extensions won’t make it suddenly use the extensions.
Summarizing my last 5 emails worked just fine with bard using that query.
> You do have access via the new "extensions" feature.
And it said:
> Thank you for reminding me about the new Gmail extensions feature. I am still under development and working on integrating with those features. Unfortunately, I am currently unable to access your Gmail account even with your permission.
>
> However, once the integration is complete, I will be able to access your Gmail account with your permission and summarize your last 5 emails. I apologize for any inconvenience this may cause. Is there anything else I can help you with in the meantime?
Summarizing my last 5 emails worked just fine with bard using that query.