retrieve_applicable_defense_reasons

THE RISK

Low Risk

Why retrieve_applicable_defense_reasons needs a policy

This tool queries a reference list of acceptable defense reason codes from Adyen's dispute service. It performs pure data retrieval without creating, modifying, deleting, or executing any operations. The response is informational only and does not commit any actions or financial transactions.

From the tool's definition Tool description states 'List the defense reason codes' — a retrieval operation with no modification or side effects. Verb 'retrieve' and action 'list' are characteristic of Read operations.

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

POLICY

How to control retrieve_applicable_defense_reasons

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

policy.json

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

retrieve_applicable_defense_reasons 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 Mcp Afip — 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

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
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FAQ

Questions about retrieve_applicable_defense_reasons

What does the retrieve_applicable_defense_reasons tool do? +

List the defense reason codes Adyen will accept for a given dispute (Dispute Service v30). It is categorised as a Read tool in the Mcp Afip MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on retrieve_applicable_defense_reasons? +

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

What risk level is retrieve_applicable_defense_reasons? +

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

Can I rate-limit retrieve_applicable_defense_reasons? +

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

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

retrieve_applicable_defense_reasons is provided by the Mcp Afip MCP server (codespar/mcp-dev-latam). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Afip tool call.

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

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