vault_repay · Basis MCP Server MCP: Risk & Policy

WHAT IT DOES

What vault_repay does on Basis MCP Server

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

WHY IT NEEDS A POLICY

Why vault_repay needs a policy

Repaying a vault loan is a financial transaction that transfers cryptocurrency tokens to settle a debt obligation on the Basis protocol. Misuse could result in unintended repayment of loans, moving funds without authorization. This falls squarely in the Financial category as it commits financial obligations/movements on a blockchain lending protocol.

From the tool's definition 'Repay vault loan' - this tool performs a financial operation on a DeFi lending protocol, repaying a loan which moves cryptocurrency assets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vault_repay Approval-gated

Any call to vault_repay 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": {
    "vault_repay": {
      "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 Basis MCP Server, so you can run agents against it safely.

FAQ

Questions about vault_repay

What does the vault_repay tool do? +

Repay vault loan. It is categorised as a Financial tool in the Basis MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on vault_repay? +

Register the Basis MCP Server MCP server in PolicyLayer and add a rule for vault_repay: 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 Basis MCP Server. Nothing to install.

What risk level is vault_repay? +

vault_repay 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 vault_repay? +

Yes. Add a rate_limit block to the vault_repay 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 vault_repay completely? +

Set action: deny in the PolicyLayer policy for vault_repay. 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 vault_repay? +

vault_repay is provided by the Basis MCP Server MCP server (launch-on-basis/mcp-ts). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.