create_access_control_policy

WHAT IT DOES

What create_access_control_policy does on ReliaQuest GreyMatter MCP Server

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

WHY IT NEEDS A POLICY

Why create_access_control_policy needs a policy

This tool creates (writes) access control policies, which are security-critical configurations that define permissions and resource access. While reversible (Write category, not Destructive), misuse could grant unauthorized access or escalate privileges, warranting high severity due to the security implications of policy creation.

From the tool's definition Tool name is 'create_access_control_policy' and description identifies it as a 'mutation createAccessControlPolicy', which creates a new access control policy in the system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_access_control_policy Rate-limited

create_access_control_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_access_control_policy": {
      "limits": [
        {
          "counter": "create_access_control_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 ReliaQuest GreyMatter MCP Server, so you can run agents against it safely.

FAQ

Questions about create_access_control_policy

What does the create_access_control_policy tool do? +

DRP Access Control \u00b7 mutation createAccessControlPolicy. Variables: after, first, notFilter, order, after1, first1, notFilter1, input. Example variables: {\. It is categorised as a Write tool in the ReliaQuest GreyMatter MCP Server 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_access_control_policy? +

Register the ReliaQuest GreyMatter MCP Server MCP server in PolicyLayer and add a rule for create_access_control_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 ReliaQuest GreyMatter MCP Server. Nothing to install.

What risk level is create_access_control_policy? +

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

Can I rate-limit create_access_control_policy? +

Yes. Add a rate_limit block to the create_access_control_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_access_control_policy completely? +

Set action: deny in the PolicyLayer policy for create_access_control_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_access_control_policy? +

create_access_control_policy is provided by the ReliaQuest GreyMatter MCP Server MCP server (space-c0wboy/reliaquest-greymatter-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.