Deposit tokens into a Yearn vault on Katana network. Only works with tokens already on Katana (USDC, ETH, WBTC, USDT, AUSD).
AI agents use depositToYearnVault to commit financial operations through Katana MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool moves cryptocurrency assets into a financial contract (Yearn vault), creating a financial obligation and commitment. Even though deposits to yield vaults are theoretically reversible (via withdrawFromYearnVault), the act of depositing commits funds to a specific financial strategy and locks them in a smart contract, making this a Financial category operation.
From the tool's definition Tool name 'depositToYearnVault' combined with description stating it deposits tokens into a Yearn vault. Context shows this is a DeFi operation on the Katana network involving actual token movement and financial commitment to a yield-generating vault.
Attacks that exploit this kind of access
Deposit tokens into a Yearn vault on Katana network. Only works with tokens already on Katana (USDC, ETH, WBTC, USDT, AUSD). It is categorised as a Financial tool in the Katana MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Katana MCP Server MCP server in PolicyLayer and add a rule for depositToYearnVault: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Katana MCP Server. Nothing to install.
depositToYearnVault is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the depositToYearnVault rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for depositToYearnVault. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
depositToYearnVault is provided by the Katana MCP Server MCP server (playainetwork/katana_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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