Void one or more previously charged transactions. Voiding differs from refunding — a void cancels a transaction that hasn
AI agents use void_transaction to commit financial operations through Ontraport MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
Voiding a transaction is a financial operation that cancels a previously charged payment. This directly affects financial obligations and revenue, making it Financial category. The severity is critical because an AI agent misusing this tool could cancel legitimate transactions, causing financial loss and revenue disruption at scale.
From the tool's definition 'Void one or more previously charged transactions. Voiding differs from refunding — a void cancels a transaction'
Attacks that exploit this kind of access
Void one or more previously charged transactions. Voiding differs from refunding — a void cancels a transaction that hasn. It is categorised as a Financial tool in the Ontraport MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Ontraport MCP Server MCP server in PolicyLayer and add a rule for void_transaction: 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 Ontraport MCP Server. Nothing to install.
void_transaction is a Financial 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 void_transaction 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 void_transaction. 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.
void_transaction is provided by the Ontraport MCP Server MCP server (landonray/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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