Cancel an existing XRPL DEX offer by its sequence number
AI agents call 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.
Cancelling an active DEX order is an irreversible action that removes a financial commitment. While it does not destroy data in the database sense, it permanently voids an active market position, which qualifies as destructive in the financial operations domain. The severity is high because misuse by an AI agent could cancel legitimate active orders, causing missed trading opportunities and financial loss.
From the tool's definition Tool description states 'Cancel an existing XRPL DEX offer' — cancellation irreversibly terminates an active financial order. The term 'cancel' combined with 'offer' on a DEX indicates removal of a live market position that cannot be undone.
Documented attack patterns abuse exactly the kind of access cancel_order gives an agent:
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 cancel_order:
{
"version": "1",
"default": "deny",
"hide": [
"cancel_order"
]
}cancel_order disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Cancel an existing XRPL DEX offer by its sequence number. 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 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.
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 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 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.
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.
Start from Waiaas, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
126 Waiaas tools catalogued and risk-classified — across an index of 43,000+ MCP servers.