Creates a new member (subscriber) in Ghost CMS.
AI agents use ghost_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.
This tool creates new subscriber records in Ghost CMS. The action is reversible (members can be deleted, as evidenced by the sibling tool 'ghost_delete_member'), making it a Write operation rather than Destructive. The severity is medium because creating unauthorized members could enable spam campaigns, unauthorized list growth, or fake engagement, but the impact is contained to the CMS and reversible.
From the tool's definition Tool name 'ghost_create_member' and description 'Creates a new member (subscriber) in Ghost CMS' indicate a create operation that adds reversible data to the system.
Documented attack patterns abuse exactly the kind of access ghost_create_member gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ghost MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for ghost_create_member:
{
"version": "1",
"default": "deny",
"tools": {
"ghost_create_member": {
"limits": [
{
"counter": "ghost_create_member_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}ghost_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.
Free to start. No card required.
Creates a new member (subscriber) in Ghost CMS. 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.
Register the Ghost MCP Server MCP server in PolicyLayer and add a rule for ghost_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.
ghost_create_member is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the ghost_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.
Set action: deny in the PolicyLayer policy for ghost_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.
ghost_create_member is provided by the Ghost MCP Server MCP server (jgardner04/ghost-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Ghost MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
39 Ghost MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.