hl_cancel_order
Cancel one or all orders for a market on Hyperliquid
This record as markdown: /tools/minhoyoo-iotrust-waiaas/hl-cancel-order.md
What hl_cancel_order does on Waiaas
AI agents call hl_cancel_order to permanently remove resources in Waiaas, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why hl_cancel_order is rated Critical
While this appears transactional, order cancellation is destructive in nature because it permanently removes an active market instruction. Unlike reversible operations (write) that can be modified or undone, a cancelled order cannot be restored to its pre-cancellation state.
From the tool's definition Tool cancels orders on Hyperliquid, which irreversibly terminates active trading positions. The action "cancel" combined with "order" on a financial exchange removes a previously submitted instruction that cannot be restored—the cancelled order state is…
Attacks that exploit this kind of access
The rule that runs hl_cancel_order safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Waiaas, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For hl_cancel_order, this is the rule to start with:
hl_cancel_order is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Waiaas, apply this rule, and every hl_cancel_order call is checked against it from then on.
Questions about hl_cancel_order
Cancel one or all orders for a market on Hyperliquid. It is categorised as a Destructive tool in the Waiaas MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Waiaas MCP server in PolicyLayer and add a rule for hl_cancel_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.
hl_cancel_order is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the hl_cancel_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.
Set action: deny in the PolicyLayer policy for hl_cancel_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.
hl_cancel_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.
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