hl_open_position

THE RISK

Critical Risk

Why hl_open_position needs a policy

This tool opens leveraged perpetual (derivatives) trading positions, which directly commits financial capital with amplified risk. Misuse could result in significant financial losses due to leverage, liquidation risk, and market exposure. This is a Financial category action with critical severity due to the leveraged nature of perpetual futures trading.

From the tool's definition Open a leveraged perpetual position on Hyperliquid with market or limit order

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

POLICY

How to control hl_open_position

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_open_position:

policy.json

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

Any call to hl_open_position 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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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.
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FAQ

Questions about hl_open_position

What does the hl_open_position tool do? +

Open a leveraged perpetual position on Hyperliquid with market or limit order. 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_open_position? +

Register the Waiaas MCP server in PolicyLayer and add a rule for hl_open_position: 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_open_position? +

hl_open_position 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_open_position? +

Yes. Add a rate_limit block to the hl_open_position 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_open_position completely? +

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

hl_open_position 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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