MCP Tool Reference Critical Risk

cancel_sent_invoice

Cancel a sent invoice

Part of the PayPal MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

WHEN AI AGENTS USE THIS TOOL

AI agents use cancel_sent_invoice to initiate financial transactions through PayPal. Financial operations involve real money and are irreversible once processed. Intercept blocks financial tools by default, requiring explicit human approval with transaction-level limits to prevent unauthorised spending.

WHY ENFORCE A POLICY ON CANCEL_SENT_INVOICE

cancel_sent_invoice moves real money. Without a policy, an autonomous agent could initiate transactions that drain accounts or exceed budgets. Intercept blocks financial tools by default, requiring human-in-the-loop approval with configurable spending limits per transaction and per time window.

RECOMMENDED POLICY

Financial tools involve real money. Block by default and require explicit human approval before enabling.

paypal.yaml
tools:
  cancel_sent_invoice:
    rules:
      - action: deny
        reason: "Requires human approval"

See the full PayPal policy for all 30 tools.

DETAILS

Tool Name

cancel_sent_invoice

Category

Financial

MCP Server

PayPal MCP Server

Risk Level

Critical

MORE PAYPAL TOOLS

View all 30 tools →

SIMILAR FINANCIAL TOOLS ON OTHER SERVERS

RELATED READING

FREQUENTLY ASKED QUESTIONS

What does the cancel_sent_invoice tool do?

Cancel a sent invoice. It is categorised as a Financial tool in the PayPal MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on cancel_sent_invoice?

Add a rule in your Intercept YAML policy under the tools section for cancel_sent_invoice. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the PayPal MCP server.

What risk level is cancel_sent_invoice?

cancel_sent_invoice is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit cancel_sent_invoice?

Yes. Add a rate_limit block to the cancel_sent_invoice rule in your Intercept 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.

How do I block cancel_sent_invoice completely?

Set action: deny in the Intercept policy for cancel_sent_invoice. 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.

What MCP server provides cancel_sent_invoice?

cancel_sent_invoice is provided by the PayPal MCP server (paypal/paypal-mcp-server). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

ENFORCE POLICIES ON PAYPAL

Open source. One binary. Zero dependencies.