AI agents use deposit_jst_for_votes to commit financial operations through Justlend — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool commits financial assets (JST tokens) into a smart contract. While the deposit is theoretically reversible through withdrawal, it represents a direct financial transaction that locks or commits the user's assets and grants governance rights. An AI agent misusing this could transfer substantial token holdings without authorization, triggering material financial loss.
From the tool's definition Deposit JST into the WJST contract—direct movement of tokens (cryptocurrency assets) to gain voting power on a DAO.
Attacks that exploit this kind of access
Deposit JST into the WJST contract to get voting power. It is categorised as a Financial tool in the Justlend MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Justlend MCP server in PolicyLayer and add a rule for deposit_jst_for_votes: 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 Justlend. Nothing to install.
deposit_jst_for_votes 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 deposit_jst_for_votes 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 deposit_jst_for_votes. 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.
deposit_jst_for_votes is provided by the Justlend MCP server (justlend/mcp-server-justlend). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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