Módosító bizonylat készítése egy meglévő számlához
AI agents use create_modification_document 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 a new modification document linked to an existing invoice. While it does not directly delete data (Destructive), it does write/create new financial records in the invoicing system. In an invoicing context, creating modification documents could alter the financial ledger and customer accounts.
From the tool's definition create_modification_document: creates a modification document (módosító bizonylat) for an existing invoice. The verb 'create' and the context of invoicing indicate a write operation that modifies financial records.
Documented attack patterns abuse exactly the kind of access create_modification_document 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_modification_document:
{
"version": "1",
"default": "deny",
"tools": {
"create_modification_document": {
"limits": [
{
"counter": "create_modification_document_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}create_modification_document 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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Módosító bizonylat készítése egy meglévő számlához. 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_modification_document: 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_modification_document 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_modification_document 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_modification_document. 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_modification_document 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.
Free to start. No card required.
42 Billingo MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.