Díjbekérőből (proforma) számla készítése
AI agents use create_from_proforma to create or update resources in Billingo MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Billingo MCP Server environment.
This tool creates (writes) a new invoice document from a proforma template. It modifies the invoicing system state by adding a new record, but the operation is reversible (the created invoice can be canceled or deleted via 'cancel_document' on the same server). This is a Write operation rather than Execute because it follows a structured API call with defined input/output, not arbitrary code execution.
From the tool's definition Tool name 'create_from_proforma' and description 'Díjbekérőből (proforma) számla készítése' (Hungarian: 'Create invoice from proforma') indicate creation of a new document (invoice) from an existing proforma template.
Documented attack patterns abuse exactly the kind of access create_from_proforma gives an agent:
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 create_from_proforma:
{
"version": "1",
"default": "deny",
"tools": {
"create_from_proforma": {
"limits": [
{
"counter": "create_from_proforma_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_from_proforma 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.
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Díjbekérőből (proforma) számla készítése. It is categorised as a Write tool in the Billingo MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Billingo MCP Server MCP server in PolicyLayer and add a rule for create_from_proforma: 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.
create_from_proforma is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_from_proforma 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.
Set action: deny in the PolicyLayer policy for create_from_proforma. 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.
create_from_proforma 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.
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.
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42 Billingo MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.