Agent identity, messages, tools, and shared memory may be compromised or mistaken. Authenticate senders, authorize actions, validate payloads, and minimize transferred data at every boundary.

Every Agent Boundary Is a Trust Boundary

Adversarial cases deliberately stress trust boundaries, parser ambiguity, goal conflict, long context, tool errors, and coordination. Tests should be authorized, reproducible, and mapped to mitigations.

Adversarial Evaluation Targets Assumptions

A Byzantine participant can send inconsistent, false, or strategically crafted messages. Tolerance requires identity, quorum assumptions, validation, and often higher replication cost.

Byzantine Faults Include Arbitrary or Adversarial Behavior

Federated designs keep data within organizational or device boundaries while sharing updates, queries, or aggregate evidence. Metadata leakage, poisoning, and unequal participation remain risks.

Federated Agent Graphs Coordinate Without Centralizing Raw Data

In this situation—accepting a tool request allegedly sent by an approval agent—which choice best applies “Every Agent Boundary Is a Trust Boundary”?

Choose the narrowest autonomy, tool scope, duration, and data access that can accomplish the goal. More autonomy raises the reachable harm surface and verification burden.

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