Cancel a single order by order_id.
AI agents call aevo_cancel_order to permanently remove resources in Aevo-MCP — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Cancelling an order is an irreversible action that removes a live trading order from the exchange. Once cancelled, the order cannot be reinstated; a new order must be created. This constitutes an irreversible deletion of a financial instruction, placing it in the Destructive category.
From the tool's definition Cancel a single order by order_id
Attacks that exploit this kind of access
Cancel a single order by order_id. It is categorised as a Destructive tool in the Aevo-MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Aevo- MCP server in PolicyLayer and add a rule for aevo_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 Aevo-MCP. Nothing to install.
aevo_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 aevo_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 aevo_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.
aevo_cancel_order is provided by the Aevo- MCP server (ribbon-finance/aevo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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