send_chargeback

THE RISK

Critical Risk

Why send_chargeback needs a policy

Chargebacks are financial dispute events that reverse payment transactions and can carry significant financial consequences including fees and merchant penalties. This tool triggers such an event, placing it firmly in the Financial category with critical severity due to the irreversible financial impact on involved parties.

From the tool's definition send_chargeback event to Sift — a chargeback is a financial reversal initiated against a transaction

Documented attack patterns abuse exactly the kind of access send_chargeback gives an agent:

POLICY

How to control send_chargeback

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for send_chargeback:

policy.json

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

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

Create a free account and register Mcp Ap2 — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

Critical-risk tools in Mcp Ap2 → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about send_chargeback

What does the send_chargeback tool do? +

Send a $chargeback event to Sift. It is categorised as a Financial tool in the Mcp Ap2 MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on send_chargeback? +

Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for send_chargeback: 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 Mcp Ap2. Nothing to install.

What risk level is send_chargeback? +

send_chargeback 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 send_chargeback? +

Yes. Add a rate_limit block to the send_chargeback 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 send_chargeback completely? +

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

send_chargeback is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Ap2 tool call.

Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →