create_member · Ghost MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_member does on Ghost MCP Server

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

WHY IT NEEDS A POLICY

Why create_member needs a policy

This tool creates new member records in the Ghost CMS system, which is a reversible data modification operation. It does not execute arbitrary code, delete data irreversibly, or move money, making Write the appropriate category. The severity is medium because creating unauthorized or spam members could degrade system integrity and user experience, though the effect can be mitigated by deletion if discovered.

From the tool's definition Tool name 'create_member' and description indicating member creation (Japanese: '新しいメンバーを作成' = 'Create a new member').

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_member Rate-limited

create_member 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_member": {
      "limits": [
        {
          "counter": "create_member_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 Ghost MCP Server, so you can run agents against it safely.

FAQ

Questions about create_member

What does the create_member tool do? +

新しいメンバーを作成. It is categorised as a Write tool in the Ghost 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_member? +

Register the Ghost MCP Server MCP server in PolicyLayer and add a rule for create_member: 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 Ghost MCP Server. Nothing to install.

What risk level is create_member? +

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

Can I rate-limit create_member? +

Yes. Add a rate_limit block to the create_member 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_member completely? +

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

create_member is provided by the Ghost MCP Server MCP server (mtane0412/ghost-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.