When the agent engages in group conversations. Recommended default for new bindings: 'mention'.
Optional ownerExtra owner user IDs honored by 'owner-only' (the binding's ownerUserId always counts).
Optional allowOnly these sender IDs may activate the agent (empty/undefined = everyone).
Optional denyThese sender IDs are always dropped (wins over allowFrom).
Optional toolTool names blocked for turns originating from this group (host-enforced).
Optional botDrop messages from bot senders (loop protection). Default true.
Group-chat safety policy. Evaluated by evaluateGroupPolicy() (./group-policy.ts) before inbound group messages reach the agent — enforced in ChannelRouter and reusable by host security gates.