get_tax_returns

THE RISK

Low Risk

Why get_tax_returns needs a policy

This tool retrieves existing tax return data without creating, modifying, or deleting records. It is a read-only query operation typical of data retrieval endpoints. While tax returns are sensitive financial documents, the tool itself does not create financial obligations, move money, or execute operations with variable effects—it simply fetches information.

From the tool's definition Tool name 'get_tax_returns' combined with description 'Get tax returns for a link (fiscal institutions)' indicates data retrieval operation.

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

POLICY

How to control get_tax_returns

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 get_tax_returns:

policy.json

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

get_tax_returns 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 Ap2 — 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 →

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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.
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_tax_returns

What does the get_tax_returns tool do? +

Get tax returns for a link (fiscal institutions). It is categorised as a Read tool in the Mcp Ap2 MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_tax_returns? +

Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for get_tax_returns: 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 get_tax_returns? +

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

Can I rate-limit get_tax_returns? +

Yes. Add a rate_limit block to the get_tax_returns 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_tax_returns completely? +

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

get_tax_returns 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 →