waybill_update · Novaposhta MCP: Risk & Policy

WHAT IT DOES

What waybill_update does on Novaposhta

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

WHY IT NEEDS A POLICY

Why waybill_update needs a policy

This tool modifies existing waybill records in a logistics system. While not irreversible (not Destructive), misuse could alter shipping details, addresses, or other waybill properties affecting real shipments and delivery operations. The high severity reflects potential for operational disruption and customer impact if a compromised AI agent modifies waybills maliciously or incorrectly.

From the tool's definition Tool name 'waybill_update' and description 'Update an existing waybill' indicate modification of data. The requirement to pass 'DocumentRef' and reference an 'InternetDocument request envelope' confirm this mutates an existing shipment/waybill record in Nova…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

waybill_update Rate-limited

waybill_update 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": {
    "waybill_update": {
      "limits": [
        {
          "counter": "waybill_update_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 Novaposhta, so you can run agents against it safely.

FAQ

Questions about waybill_update

What does the waybill_update tool do? +

Update an existing waybill. Per doc 1.2 the same InternetDocument request envelope is used for update calls, so pass the raw payload (must include DocumentRef) exactly as defined by Nova Poshta. It is categorised as a Write tool in the Novaposhta MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on waybill_update? +

Register the Novaposhta MCP server in PolicyLayer and add a rule for waybill_update: 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 Novaposhta. Nothing to install.

What risk level is waybill_update? +

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

Can I rate-limit waybill_update? +

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

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

waybill_update is provided by the Novaposhta MCP server (@shopana/novaposhta-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.