hl_place_order

THE RISK

Critical Risk

Why hl_place_order needs a policy

This tool places trading orders on Hyperliquid, a perpetuals DEX. Placing stop-loss or take-profit orders commits financial obligations and can result in asset sales/purchases at specified price levels. This is a direct financial action involving crypto assets, fitting the Financial category. Misuse could trigger unintended trades, causing significant financial loss.

From the tool's definition Place a conditional order (stop-loss or take-profit) on Hyperliquid

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

POLICY

How to control hl_place_order

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_place_order:

policy.json

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

Any call to hl_place_order 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.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
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FAQ

Questions about hl_place_order

What does the hl_place_order tool do? +

Place a conditional order (stop-loss or take-profit) 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_place_order? +

Register the Waiaas MCP server in PolicyLayer and add a rule for hl_place_order: 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_place_order? +

hl_place_order 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_place_order? +

Yes. Add a rate_limit block to the hl_place_order 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_place_order completely? +

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

hl_place_order 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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