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Delegated Authority for Sub-Agents: Token Exchange and DPoP

Originally published on AI Tech Connect.

What this guide covers, and where the credentials guide stops Our guide to least-privilege credentials for AI agents answers one question: when an agent acts as itself, what credential should it hold, where should it live, and how small can the permission set be? Read it first — everything here assumes it. This guide answers a different one. When agent A spawns sub-agent B to act on a named human's behalf, how does B prove who it is, whose authority it carries, and how far that authority extends? That is not a secrets problem, it is a chain problem — and you can have immaculate credential hygiene and still fail an enterprise security review, because the reviewer's question is not "where is the key" but "who asked for this, which component executed it, and how do you know?" "The agent has…


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