hl_spot_sell

THE RISK

Critical Risk

Why hl_spot_sell needs a policy

This tool executes a sell order on a cryptocurrency exchange (Hyperliquid), directly committing to a financial transaction that exchanges crypto assets. This is a financial operation with potentially high blast radius if misused by an AI agent, as it can liquidate holdings at market or limit prices without the possibility of reversal once executed.

From the tool's definition Place a spot sell order on Hyperliquid (market or limit)

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

POLICY

How to control hl_spot_sell

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_spot_sell:

policy.json

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

Any call to hl_spot_sell 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_spot_sell

What does the hl_spot_sell tool do? +

Place a spot sell order on Hyperliquid (market or limit). 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_spot_sell? +

Register the Waiaas MCP server in PolicyLayer and add a rule for hl_spot_sell: 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_spot_sell? +

hl_spot_sell 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_spot_sell? +

Yes. Add a rate_limit block to the hl_spot_sell 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_spot_sell completely? +

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

hl_spot_sell 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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