fund-account · Josectoscano Stellar MCP: Risk & Policy

WHAT IT DOES

What fund-account does on Josectoscano Stellar

AI agents use fund-account to commit financial operations through Josectoscano Stellar — usually the final step of a payment, billing, or trading workflow. A call moves real money.

WHY IT NEEDS A POLICY

Why fund-account needs a policy

This tool moves cryptocurrency (lumens) to a Stellar account, which is a financial operation. However, since it explicitly targets the testnet environment, real funds are not at risk, reducing severity from high to medium. If misused in a mainnet context or if testnet/mainnet boundaries are unclear, the blast radius could be higher.

From the tool's definition Fund a Stellar account with testnet lumens

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fund-account Approval-gated

Any call to fund-account 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": {
    "fund-account": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

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Instant setup, no code required.

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

FAQ

Questions about fund-account

What does the fund-account tool do? +

Fund a Stellar account with testnet lumens. It is categorised as a Financial tool in the Josectoscano Stellar MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on fund-account? +

Register the Josectoscano Stellar MCP server in PolicyLayer and add a rule for fund-account: 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 Josectoscano Stellar. Nothing to install.

What risk level is fund-account? +

fund-account 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 fund-account? +

Yes. Add a rate_limit block to the fund-account 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 fund-account completely? +

Set action: deny in the PolicyLayer policy for fund-account. 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 fund-account? +

fund-account is provided by the Josectoscano Stellar MCP server (@iflow-mcp/josectoscano-stellar-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.