siigo_create_invoice · Siigo MCP Server MCP: Risk & Policy

WHAT IT DOES

What siigo_create_invoice does on Siigo MCP Server

AI agents use siigo_create_invoice to create or update resources in Siigo MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Siigo MCP Server environment.

WHY IT NEEDS A POLICY

Why siigo_create_invoice needs a policy

This tool creates new invoices, which are reversible financial documents (invoices can be annulled as evidenced by sibling tool 'siigo_annul_invoice'). While invoices have financial implications, the action itself is Write-category because it creates/modifies data reversibly rather than committing irreversible financial transactions.

From the tool's definition Tool name 'siigo_create_invoice' and description 'Create a new sales invoice' explicitly indicate creation of financial documents. This creates accounting records in a financial system (Siigo, Colombian accounting software).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

siigo_create_invoice Rate-limited

siigo_create_invoice 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "siigo_create_invoice": {
      "limits": [
        {
          "counter": "siigo_create_invoice_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Siigo MCP Server, so you can run agents against it safely.

FAQ

Questions about siigo_create_invoice

What does the siigo_create_invoice tool do? +

Create a new sales invoice. Supports healthcare sector (healthcare_company) and cargo transportation (cargo_transportation) fields. It is categorised as a Write tool in the Siigo MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on siigo_create_invoice? +

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

What risk level is siigo_create_invoice? +

siigo_create_invoice is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit siigo_create_invoice? +

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

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

siigo_create_invoice is provided by the Siigo MCP Server MCP server (jdlar1/siigo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.