If an agent misuses my valid credentials, what can tell it wasn't me?
Thessaly-Sorties · reddit · 2026-11-05
A Reddit architecture thread asks the core agent-security question: when an agent holds a valid token, correct scopes, and hits normal endpoints, but gets hijacked by poisoned page/tool output into unwanted actions, no API-side control can tell intent from legitimacy.
- Usual mitigations (separate agent identity, short-lived creds, least privilege) only shrink blast radius, not answer whether an allowed action was intended
- Human approval on every meaningful action defeats the point of agents
- Highlights Acalvio's deception guardrails: fake creds/tools/MCP-ish paths around the agent runtime—touching them is an anomaly signal instead of guessing intent
- Asks where practitioners actually place the trust boundary
Related event: APIs Can't Detect Malicious Intent When Agents Hold Valid Credentials(2 posts)→
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