These are agents that request and utilize liquidity from vaults. They could take the form of strategists, borrowers, market makers, etc. They propose potential Instruments. By doing so, they generate a new prediction market and deploy a new instrument contract(inherited from the protocol’s base class).
Examples
A borrower who wants to open a creditline with his credit and/or collateral.
Someone who wants to create a new lending pool that accepts collateral OR conditions of his choice
An options market maker who wants to take the opposite side of the trade(hedged) with the vault and capture a riskless spread
A strategist proposing a yield strategy
Asset manager proposing asset allocations(e.g buy and hold ETH)