check_availability

THE RISK

Low Risk

Why check_availability needs a policy

This tool performs a data retrieval operation (checking/reading availability status) with no side effects. It does not create, modify, delete data, execute code, process payments, or trigger irreversible actions. The low severity reflects minimal risk even if misused by an AI agent, as it only exposes read-only product and delivery information.

From the tool's definition Tool name 'check_availability' and description 'Check product stock and delivery availability for a specific location' indicate a query operation that retrieves current inventory and logistics data without modifying, executing external operations, or causing…

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

POLICY

How to control check_availability

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 check_availability:

policy.json

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

check_availability 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 →

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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 check_availability

What does the check_availability tool do? +

Check product stock and delivery availability for a specific location. 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 check_availability? +

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

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

Can I rate-limit check_availability? +

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

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

check_availability 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 →