transferToken

THE RISK

Critical Risk

Why transferToken needs a policy

This tool moves cryptocurrency tokens (ERC-20 assets) from one address to another. Even though the transfer is reversible in technical terms, it commits financial value to a recipient and represents an irreversible economic obligation from the user's perspective.

From the tool's definition Tool description explicitly states 'Transfers a specified amount of ERC-20 tokens to a recipient address' - this is a direct transfer of cryptocurrency assets.

Documented attack patterns abuse exactly the kind of access transferToken gives an agent:

POLICY

How to control transferToken

PolicyLayer is an MCP gateway — it sits between your AI agents and Token Minter, and nothing reaches the server without passing your rules. This is the rule we recommend for transferToken:

policy.json

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

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

Create a free account and register Token Minter — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

GATE THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Token Minter tools

Financial deployToken Deploys a new ERC-20 token on the specified EVM-compatible chain with customizable decimal Read getBalance Queries the native token balance (e.g., ETH or POL) of the current account on the specifie Read getTokenBalance Queries the balance of a specific ERC-20 token for the current account on the specified ch Read getTokenInfo Queries information about an existing ERC-20 token, including name, symbol, decimals, and Read getTransactionInfo Retrieves details about a transaction, including sender, recipient, value, status, and dep

All 6 Token Minter tools →

Financial tools on other servers

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Go deeper

Critical-risk tools in Token Minter → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about transferToken

What does the transferToken tool do? +

Transfers a specified amount of ERC-20 tokens to a recipient address and waits for transaction confirmation. It is categorised as a Financial tool in the Token Minter MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on transferToken? +

Register the Token Minter MCP server in PolicyLayer and add a rule for transferToken: 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 Token Minter. Nothing to install.

What risk level is transferToken? +

transferToken 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 transferToken? +

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

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

transferToken is provided by the Token Minter MCP server (kukapay/token-minter-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Token Minter tool call.

Start from Token Minter, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →