Why an attached item only applies to one message

An attached connector reference applies to your very next message only, and nothing beyond it. Picking an email with /gmail and then typing "summarize this" attaches that specific email to that one request.

It is not kept attached to every message you send from that point forward in the session. This is a deliberate scoping choice, not a limitation you need to work around.

The practical benefit is that there is never a stale piece of context left silently attached from three messages ago that you had forgotten was still there, quietly influencing an unrelated later request.

If a follow-up message still needs the same reference, attaching it again for that specific message is the correct pattern; there is no command that re-attaches whatever was last attached to a later message automatically.

This one-message scope also makes a session's history easier to reason about after the fact: any turn that used a connector reference did so because it was explicitly attached for that specific message, never inherited silently from context earlier in the conversation.