create_policy · PolicyGuard MCP: Risk & Policy

WHAT IT DOES

What create_policy does on PolicyGuard

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

WHY IT NEEDS A POLICY

Why create_policy needs a policy

This tool creates new policies that govern AI agent behavior and enforce security rules. Policy creation is a reversible Write operation (policies can be updated or deleted), but carries high severity because malicious or misconfigured policies could disable legitimate security controls, bypass access restrictions, or weaken compliance monitoring across the organization.

From the tool's definition Tool name 'create_policy' combined with server context (PolicyGuard provides policy-based access control and governance) indicates creation of access control policies.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_policy Rate-limited

create_policy 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": {
    "create_policy": {
      "limits": [
        {
          "counter": "create_policy_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 PolicyGuard, so you can run agents against it safely.

FAQ

Questions about create_policy

What does the create_policy tool do? +

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

How do I enforce a policy on create_policy? +

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

What risk level is create_policy? +

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

Can I rate-limit create_policy? +

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

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

create_policy is provided by the PolicyGuard MCP server (prateekkumar1709/policyguard). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.