The Briefing-and-Binding Envelope: A Delivery Contract for Agent-to-Principal Decision Moments with Dual-Veto Reconciliation

This memo specifies the briefing-and-binding envelope: a delivery contract for the wire-level structure by which an artificial- intelligence agent surfaces a consequential decision to the human principal it acts for, and by which the principal commits, declines, amends, or rejects that decision. The envelope carries eight named slots (a synopsis, findings, recommendations, an offer of detail, a question stem, a set of options each marked with its own reasoning, a single recommended option, and a pair of escape hatches) and is emitted as a structured field of a Model Context Protocol [MCP] tool result. The contribution is the delivery contract itself: a single renderer-agnostic envelope so that the briefing an agent delivers and the binding a principal commits back have one machine-checkable shape across every consuming surface. The load-bearing element is the dual-veto handshake: one escape hatch lets the principal revise the answer space while accepting the question; the other lets the principal reject the question itself and reopen deliberation. Either party may veto. The memo is Informational. No new transport is introduced; the envelope composes with the handle namespace of [IDPRONOUNS] and the MCP tool surface of [POLICYPROV].