get_refund

THE RISK

Low Risk

Why get_refund needs a policy

This tool only retrieves and returns existing refund data by ID. It performs no side effects, does not execute operations, does not modify or delete data, and does not move money. It is purely a read/query operation.

From the tool's definition Tool name is 'get_refund' and description states 'Get a single refund by ID. Returns full refund record.' - the verb 'Get' and phrase 'Returns' indicate retrieval of existing data with no modification.

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

POLICY

How to control get_refund

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_refund": {}
  }
}

get_refund is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 93 Sapo tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_refund

What does the get_refund tool do? +

Get a single refund by ID. Returns full refund record. It is categorised as a Read tool in the Sapo MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_refund? +

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

What risk level is get_refund? +

get_refund is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_refund? +

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

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

get_refund is provided by the Sapo MCP server (nguyennguyenit/sapo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sapo tool call.

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

CHECK YOUR STACK →