Cancel an open order
AI agents call charisma_cancel_order to permanently remove resources in Stacks AI MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Cancelling an open order permanently removes it from the blockchain state and cannot be reversed. This is an irreversible modification of financial state on a DeFi platform. While it does not delete stored data directly, it terminates a financial obligation/position that cannot be restored without manual re-entry. This meets the Destructive criteria as an action that 'cannot be undone'.
From the tool's definition Tool name is 'charisma_cancel_order' with description 'Cancel an open order'. Cancellation of orders is an irreversible action that removes an existing financial commitment from the order book and cannot be undone without creating a new order.
Attacks that exploit this kind of access
Cancel an open order. It is categorised as a Destructive tool in the Stacks AI MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Stacks AI MCP Server MCP server in PolicyLayer and add a rule for charisma_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 Stacks AI MCP Server. Nothing to install.
charisma_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 charisma_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 charisma_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.
charisma_cancel_order is provided by the Stacks AI MCP Server MCP server (stack-ai-mcp/stacks-mcp-server). 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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