get_trading_fees

THE RISK

Low Risk

Why get_trading_fees needs a policy

This tool fetches read-only data about trading fees and withdrawal limits. It does not modify any state, move money, or execute any operations. The description clearly indicates a query/retrieval action. Confidence is slightly reduced because the server context (AFIP/electronic invoicing) is unusual for a trading fees tool, suggesting possible mismatch or multi-purpose server.

From the tool's definition 'Get current trading fees and limits (maker/taker per pair, withdrawal limits)' — retrieves fee and limit information only

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

POLICY

How to control get_trading_fees

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 get_trading_fees:

policy.json

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

get_trading_fees 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.

CAP THIS TOOL →

Free to start. No card required.

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_trading_fees

What does the get_trading_fees tool do? +

Get current trading fees and limits (maker/taker per pair, withdrawal limits). 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 get_trading_fees? +

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

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

Can I rate-limit get_trading_fees? +

Yes. Add a rate_limit block to the get_trading_fees 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_trading_fees completely? +

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

get_trading_fees 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 →