Guardrails the chain enforces
Give autonomous agents room to operate inside bounds the chain enforces — not bounds a prompt can talk its way past.
An autonomous agent produces transactions no one reviewed — that’s the whole point of running one. So it needs a hard limit on what it can move. The bound has to be somewhere the agent can’t reason around.
What an agent stack actually needs
Mechanical guardrails
The agent’s keys must not be able to move funds outside the mandate, regardless of what the model is told or generates.
Per-strategy isolation
Many agents, many strategies, no shared blast radius. One agent going off the rails should not affect the others.
Pre-flight simulation
Catch bad outcomes before they cost money. Multi-step bundles dry-run against current chain state.
Trust assumptions in the gate
A vendor’s policy engine is just another input the agent could try to manipulate. The gate has to be one the agent can’t reason around.
Preventive, deterministic, onchain
Bound is the smart account itself
The role specifies exactly which contracts, functions, and parameter ranges the agent may touch. Out-of-bound calls revert on the chain — no inference, no judge, no probing surface.
Per-strategy Safes
Spinning up a new strategy is a deployment, not a re-architecting. One strategy’s keys cannot reach into another strategy’s funds.
Atomic multi-step bundles
Bundle multiple actions into one transaction. If step N would fail or violate a condition, the whole bundle reverts. No partial state.
No model in the critical path
Permission checks are deterministic and enforced onchain. No vendor coordinator in the hot path.
An LLM-driven yield optimizer
You run an LLM yield agent across two strategies: stablecoin lending and ETH staking-yield rotation. Each strategy is its own Safe with its own role.
The stablecoin strategy is scoped to aave.supply and morpho.supply on USDC, DAI, USDS only. Max single position 30% of TVL. No leverage.
If the model hallucinates and goes off the rails — say it tries to move funds to an address outside the allowlist — the smart account rejects the call in microseconds. Nothing to triage, no human in the loop: the chain returns “denied” and the agent moves on.