override_freshness · Mcp Veggie MCP: Risk & Policy

WHAT IT DOES

What override_freshness does on Mcp Veggie

AI agents use override_freshness 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 override_freshness needs a policy

This tool modifies stored freshness data for a produce item, which is a reversible write operation. It updates an estimate based on user correction, similar to an update/patch action. No code execution, deletion, or financial impact is involved. Severity is low because the blast radius is limited to freshness tracking data within a vegetable box app.

From the tool's definition Override freshness estimate for a produce item (user correction)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

override_freshness Rate-limited

override_freshness 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": {
    "override_freshness": {
      "limits": [
        {
          "counter": "override_freshness_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 override_freshness

What does the override_freshness tool do? +

Override freshness estimate for a produce item (user correction). 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 override_freshness? +

Register the Mcp Veggie MCP server in PolicyLayer and add a rule for override_freshness: 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 override_freshness? +

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

Can I rate-limit override_freshness? +

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

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

override_freshness 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.