AI agents use withdraw_all to commit financial operations through Justlend — usually the final step of a payment, billing, or trading workflow. A call moves real money.
This tool moves all supplied crypto assets out of a lending market (JustLend DAO on TRON), constituting a financial operation that transfers funds. Withdrawing all assets at once has a high blast radius — an AI agent misusing this could drain an entire lending position, potentially triggering liquidations or loss of yield.
From the tool's definition Withdraw ALL supplied assets from a JustLend market by redeeming all jTokens
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Withdraw ALL supplied assets from a JustLend market by redeeming all jTokens. 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 withdraw_all: 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.
withdraw_all 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 withdraw_all 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 withdraw_all. 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.
withdraw_all 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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