withdraw_votes_to_jst · Justlend MCP: Risk & Policy

WHAT IT DOES

What withdraw_votes_to_jst does on Justlend

AI agents use withdraw_votes_to_jst to commit financial operations through Justlend — usually the final step of a payment, billing, or trading workflow. A call moves real money.

WHY IT NEEDS A POLICY

Why withdraw_votes_to_jst needs a policy

This tool performs a token conversion/withdrawal on a DeFi protocol (JustLend DAO on TRON), moving WJST tokens back to JST. This constitutes a financial operation as it involves moving crypto assets/tokens.

From the tool's definition Withdraw WJST back to JST — moves/converts governance tokens (WJST) back to underlying financial asset (JST) on a DeFi lending protocol

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

withdraw_votes_to_jst Approval-gated

Any call to withdraw_votes_to_jst is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "withdraw_votes_to_jst": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Justlend, so you can run agents against it safely.

FAQ

Questions about withdraw_votes_to_jst

What does the withdraw_votes_to_jst tool do? +

Withdraw WJST back to JST. Can only withdraw votes that are not currently locked in active proposals. 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.

How do I enforce a policy on withdraw_votes_to_jst? +

Register the Justlend MCP server in PolicyLayer and add a rule for withdraw_votes_to_jst: 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.

What risk level is withdraw_votes_to_jst? +

withdraw_votes_to_jst is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit withdraw_votes_to_jst? +

Yes. Add a rate_limit block to the withdraw_votes_to_jst 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.

How do I block withdraw_votes_to_jst completely? +

Set action: deny in the PolicyLayer policy for withdraw_votes_to_jst. 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.

What MCP server provides withdraw_votes_to_jst? +

withdraw_votes_to_jst 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.