isDefault is the default mint target — the user’s chosen default card (update_settings default_payment), falling back to the newest active one. When the user’s default payment is the wallet balance, no row is marked (mints draw on the balance); create_card can pick a specific one via connected_card_id.
Not the same as list_cards: that lists the virtual cards Agentcard issues; this lists the user’s own cards those virtual cards can charge.
Parameters
This tool takes no parameters.Returns
The attached-card enrollments newest first, each withid (pass it to create_card’s connected_card_id or to remove_attached_card), brand, last4, status (pending, active, or ineligible), and isDefault (whether create_card uses it when no connected_card_id is given), plus a count. With no attached cards, you get an empty list and a note pointing at attach_card.