MVE envelope schema

The Multipliers Value Envelope (MVE) is the standard payload shape for surfacing measurable business value from any tool, agent, or MCP server invocation. Embed it at result._meta.multipliers_value on any MCP tool result — a single outcome, or an outcomes array.

Multipliers’ tenant-side gateway parses this and writes to the agent_run_outcomes table with source='mcp_external', so third-party value flows into the same governance dashboard, CFO ROI export, and audit log as first-party Multipliers agents.