update_route · Defined MCP: Risk & Policy

WHAT IT DOES

What update_route does on Defined

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

WHY IT NEEDS A POLICY

Why update_route needs a policy

Updates to network routes are reversible modifications (Write category) that could redirect traffic and affect network behavior, but are not irreversible deletions (not Destructive) or code execution (not Execute). The empty description reduces confidence slightly, but the tool name and server context clearly indicate route configuration modification.

From the tool's definition Tool name 'update_route' suggests modification of routing configuration. Context shows this is part of a network infrastructure management server (defined-mcp) that handles firewall rules, hosts, and network configuration.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_route Rate-limited

update_route 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": {
    "update_route": {
      "limits": [
        {
          "counter": "update_route_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 Defined, so you can run agents against it safely.

FAQ

Questions about update_route

What does the update_route tool do? +

update_route. It is categorised as a Write tool in the Defined MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_route? +

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

What risk level is update_route? +

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

Can I rate-limit update_route? +

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

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

update_route is provided by the Defined MCP server (quickvm/defined-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.