activate_invoice · Sanka MCP Server MCP: Risk & Policy

WHAT IT DOES

What activate_invoice does on Sanka MCP Server

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

WHY IT NEEDS A POLICY

Why activate_invoice needs a policy

The tool performs a reversible state change on a financial document (invoice), moving it from archived to active status. While it affects an invoice (which has financial implications), the action itself is a metadata/status update rather than moving money or creating financial obligations. The change is reversible (the invoice could be re-archived). This qualifies as Write rather than Financial or Destructive.

From the tool's definition Tool description states 'Restore an archived invoice to active usage status' — this modifies the state of an invoice record by changing it from archived to active.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

activate_invoice Rate-limited

activate_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": {
    "activate_invoice": {
      "limits": [
        {
          "counter": "activate_invoice_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about activate_invoice

What does the activate_invoice tool do? +

Restore an archived invoice to active usage status in Sanka. It is categorised as a Write tool in the Sanka 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 activate_invoice? +

Register the Sanka MCP Server MCP server in PolicyLayer and add a rule for activate_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 Sanka MCP Server. Nothing to install.

What risk level is activate_invoice? +

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

Can I rate-limit activate_invoice? +

Yes. Add a rate_limit block to the activate_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 activate_invoice completely? +

Set action: deny in the PolicyLayer policy for activate_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 activate_invoice? +

activate_invoice is provided by the Sanka MCP Server MCP server (sankahq/sanka-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.