# Vault Guardian

Vault Guardian is elected by the Vault Owner (treasury) to rebalance the underlying assets to optimize for the [objective-function](https://docs.aera.finance/v1-archive/concepts/objective-function "mention"). The Guardian can control the following parameters for the underlying [balancer-managed-pool](https://docs.aera.finance/v1-archive/concepts/aera-vault/balancer-managed-pool "mention").

* Pool swap fees
* Pool weight update schedule
* Pool trading.

The Guardian cannot:

* Deposit or withdraw any funds/liquidity
* Add or remove asset types
* Execute instantaneous value-leaking operations (such as instantaneous weight changes)
* Delegate Guardian responsibilities.