request_faucet · Manifest MCP: Risk & Policy

WHAT IT DOES

What request_faucet does on Manifest MCP

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

WHY IT NEEDS A POLICY

Why request_faucet needs a policy

This tool requests tokens (cryptocurrency/testnet assets) from a faucet, which constitutes a financial operation involving the acquisition of digital assets. Although these are testnet tokens with no real monetary value, the action commits a network-level financial transaction (token transfer) and could be misused to drain faucet resources or spam the network.

From the tool's definition Request testnet tokens from the faucet

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

request_faucet Approval-gated

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

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FAQ

Questions about request_faucet

What does the request_faucet tool do? +

Request testnet tokens from the faucet. It is categorised as a Financial tool in the Manifest MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on request_faucet? +

Register the Manifest MCP server in PolicyLayer and add a rule for request_faucet: 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 Manifest MCP. Nothing to install.

What risk level is request_faucet? +

request_faucet 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 request_faucet? +

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

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

request_faucet is provided by the Manifest MCP server (manifest-network/manifest-mcp-mono). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.