set_box_url · Mcp Veggie MCP: Risk & Policy

WHAT IT DOES

What set_box_url does on Mcp Veggie

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

WHY IT NEEDS A POLICY

Why set_box_url needs a policy

The tool modifies a stored configuration parameter (the box URL) but does not delete data, execute external code, or trigger irreversible actions. It is a standard Write operation with minimal blast radius—a misconfigured URL would only affect data retrieval for this service, not cause financial loss or destructive outcomes.

From the tool's definition Tool name 'set_box_url' and description 'Set the Aarstiderne box URL to track' indicate creation or modification of a configuration setting (the box URL). This is reversible data modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_box_url Rate-limited

set_box_url 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": {
    "set_box_url": {
      "limits": [
        {
          "counter": "set_box_url_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 Mcp Veggie, so you can run agents against it safely.

FAQ

Questions about set_box_url

What does the set_box_url tool do? +

Set the Aarstiderne box URL to track. It is categorised as a Write tool in the Mcp Veggie MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_box_url? +

Register the Mcp Veggie MCP server in PolicyLayer and add a rule for set_box_url: 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 Mcp Veggie. Nothing to install.

What risk level is set_box_url? +

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

Can I rate-limit set_box_url? +

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

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

set_box_url is provided by the Mcp Veggie MCP server (lovettbarron/mcp-veggiebox). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.