# Controller The Controller's main functions include deploying and retrieving assets in the Vault, as well as rebalancing to manage liquidity pool and align the market price with the Index Price. It's separate from the Vault to enhance security since they serve different roles and don't need to share the same state. The Controller is restricted to moving assets into predefined smart contracts of DeFi applications. Each Vault has its dedicated Controller, tailored to its structure. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://deltafi.gitbook.io/deltafi-docs/wemix3.0/protocol-design/controller.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.