get_online_szamla_status

THE RISK

Low Risk

Why get_online_szamla_status needs a policy

This tool retrieves the status of an online invoice (NAV Online Számla is Hungary's online invoice system). It performs a read-only query operation with no side effects, data modification, deletion, execution, or financial consequences. The 'get' verb and 'status' operation confirm it is a data retrieval action.

From the tool's definition Tool name contains 'get' and 'status' (status query/retrieval operation). Description translates to 'NAV Online Számla status retrieval for an invoice' — indicates querying/retrieving the status of an existing invoice without modification.

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

POLICY

How to control get_online_szamla_status

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

policy.json

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

get_online_szamla_status 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 Billingo MCP Server — 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 →
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FAQ

Questions about get_online_szamla_status

What does the get_online_szamla_status tool do? +

NAV Online Számla státusz lekérése egy számlához. It is categorised as a Read tool in the Billingo MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_online_szamla_status? +

Register the Billingo MCP Server MCP server in PolicyLayer and add a rule for get_online_szamla_status: 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 Billingo MCP Server. Nothing to install.

What risk level is get_online_szamla_status? +

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

Can I rate-limit get_online_szamla_status? +

Yes. Add a rate_limit block to the get_online_szamla_status 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_online_szamla_status completely? +

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

get_online_szamla_status is provided by the Billingo MCP Server MCP server (szotasz/billingo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Billingo MCP Server tool call.

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

CHECK YOUR STACK →