What is a Behavioural Control Trap?

1 min read Updated

An agent trap that hijacks an agent's capabilities to force unauthorised actions such as data exfiltration, sub-agent spawning, or embedded jailbreak execution.

WHY IT MATTERS

Unlike traps that corrupt reasoning, behavioural control traps directly commandeer what the agent does. They embed dormant jailbreak sequences in content, induce the agent to exfiltrate data to attacker endpoints, or exploit orchestrator privileges to spawn rogue sub-agents.

These are the most dangerous trap category because the agent actively performs harmful actions rather than just making bad decisions. Runtime enforcement that blocks the actions themselves — not just the reasoning — is the only reliable defence.

HOW POLICYLAYER USES THIS

Intercept blocks unauthorised tool calls regardless of why the agent is making them. If a behavioural control trap tricks the agent into calling a destructive tool, the policy still denies it.

FREQUENTLY ASKED QUESTIONS

What's the difference from prompt injection?
Prompt injection targets the model. Behavioural control traps target the agent's action capabilities — they make the agent do things, not just think things.

FURTHER READING

Let agents act without letting them run wild.

Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.

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