AI agents use ghost_create_post 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 content in a CMS, which is a reversible write operation. It does not execute arbitrary code, delete data irreversibly, or move money. The severity is medium because unauthorized post creation could degrade content quality and require cleanup, but the blast radius is limited to content management and doesn't affect financial systems or core infrastructure.
From the tool's definition Tool name 'ghost_create_post' and description 'Creates a new post in Ghost CMS' indicate creation of new content data that is reversible (posts can be edited or deleted).
Documented attack patterns abuse exactly the kind of access ghost_create_post 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_post:
{
"version": "1",
"default": "deny",
"tools": {
"ghost_create_post": {
"limits": [
{
"counter": "ghost_create_post_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}ghost_create_post 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.
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Creates a new post 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_post: 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_post 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_post 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_post. 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_post 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.
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39 Ghost MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.