hl_transfer_usdc

THE RISK

Critical Risk

Why hl_transfer_usdc needs a policy

This tool moves USDC, a USD-denominated stablecoin with real monetary value, between different account types (Spot and Perp) on Hyperliquid. Even though the transfer is between accounts on the same platform rather than to external addresses, it represents a commitment of financial assets and can expose the agent to market risk (e.g., transferring to a Perp account for leveraged trading).

From the tool's definition Tool name 'hl_transfer_usdc' and description 'Transfer USDC between Spot and Perp accounts' directly indicates movement of a stablecoin (USDC) across accounts. USDC is a real financial asset with monetary value.

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

POLICY

How to control hl_transfer_usdc

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

policy.json

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

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

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

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EXPLORE

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FAQ

Questions about hl_transfer_usdc

What does the hl_transfer_usdc tool do? +

Transfer USDC between Spot and Perp accounts on Hyperliquid. It is categorised as a Financial tool in the Waiaas MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on hl_transfer_usdc? +

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

What risk level is hl_transfer_usdc? +

hl_transfer_usdc 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 hl_transfer_usdc? +

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

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

hl_transfer_usdc is provided by the Waiaas MCP server (minhoyoo-iotrust/waiaas). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Waiaas tool call.

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

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