submit_dispute_evidence

THE RISK

Medium Risk

Why submit_dispute_evidence needs a policy

This tool creates or modifies dispute records by appending evidence to an existing dispute case. It is reversible (evidence can typically be replaced or withdrawn in most tax authority systems) and does not delete, execute arbitrary code, or move money.

From the tool's definition Tool description states 'Submit evidence to defend a dispute' and explicitly mentions 'Pass the evidence payload (document references, rebuttal text, etc.) in the body.' The verb 'submit' and the act of passing a payload indicates data creation/modification…

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

POLICY

How to control submit_dispute_evidence

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 submit_dispute_evidence:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "submit_dispute_evidence": {
      "limits": [
        {
          "counter": "submit_dispute_evidence_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

submit_dispute_evidence stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. 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.

LIMIT THIS TOOL →

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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.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about submit_dispute_evidence

What does the submit_dispute_evidence tool do? +

Submit evidence to defend a dispute. Pass the evidence payload (document references, rebuttal text, etc.) in the body. It is categorised as a Write tool in the Mcp Afip MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on submit_dispute_evidence? +

Register the Mcp Afip MCP server in PolicyLayer and add a rule for submit_dispute_evidence: 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 submit_dispute_evidence? +

submit_dispute_evidence is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit submit_dispute_evidence? +

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

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

submit_dispute_evidence 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.

CHECK YOUR STACK →