set_guard_zone · Zont MCP: Risk & Policy

WHAT IT DOES

What set_guard_zone does on Zont

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

WHY IT NEEDS A POLICY

Why set_guard_zone needs a policy

This tool modifies the armed/disarmed state of a security guard zone. It is a reversible state change (arm/disarm), placing it in Write. However, the blast radius is high because incorrectly disarming a security zone could expose a premises to physical intrusion or disable an alarm system, making misuse potentially dangerous.

From the tool's definition 'Поставить охранную зону на охрану или снять с охраны' — arms or disarms a security/guard zone

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_guard_zone Rate-limited

set_guard_zone 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_guard_zone": {
      "limits": [
        {
          "counter": "set_guard_zone_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 Zont, so you can run agents against it safely.

FAQ

Questions about set_guard_zone

What does the set_guard_zone tool do? +

Поставить охранную зону на охрану или снять с охраны. It is categorised as a Write tool in the Zont 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_guard_zone? +

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

What risk level is set_guard_zone? +

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

Can I rate-limit set_guard_zone? +

Yes. Add a rate_limit block to the set_guard_zone 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_guard_zone completely? +

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

set_guard_zone is provided by the Zont MCP server (mab2908/zont-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.