cancel_subscription

Cancel an active subscription

SERVERPayPal SOURCE@modelcontextprotocol/server-paypal

Critical RISK CLASS

Category Financial

Parameters 00 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/paypal/cancel-subscription.md

WHAT IT DOES

What cancel_subscription does on PayPal

AI agents use cancel_subscription to commit financial operations through PayPal, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why cancel_subscription is rated Critical

Cancelling an active subscription terminates a recurring financial obligation/revenue stream. This is a financial action with potentially irreversible consequences (loss of service, revenue, or contractual commitment), placing it in the Financial category at critical severity given the direct monetary impact on PayPal subscriptions.

From the tool's definition 'cancel_subscription' - 'Cancel an active subscription'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs cancel_subscription safely

PolicyLayer is an MCP gateway: it sits between your AI agents and PayPal, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For cancel_subscription, this is the rule to start with:

cancel_subscription Approval-gated

Any call to cancel_subscription is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "cancel_subscription": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

GATE THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect PayPal, apply this rule, and every cancel_subscription call is checked against it from then on.

FAQ

Questions about cancel_subscription

What does the cancel_subscription tool do? +

Cancel an active subscription. 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_subscription? +

Register the PayPal MCP server in PolicyLayer and add a rule for cancel_subscription: 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 PayPal. Nothing to install.

What risk level is cancel_subscription? +

cancel_subscription 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_subscription? +

Yes. Add a rate_limit block to the cancel_subscription 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.

How do I block cancel_subscription completely? +

Set action: deny in the PolicyLayer policy for cancel_subscription. 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_subscription? +

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

KEEP EXPLORING

More on PayPal, and thousands of servers like it.

This server

All 30 PayPal tools → Critical-risk tools on this server →

Across the catalogue

All critical-risk MCP tools → The MCP Attack Database →

Guides

Govern MCP payment tools →Human-in-the-loop →Tool call approval →