AI agents call newsletters_delete to permanently remove resources in Ghost MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Newsletter deletion is an irreversible operation that removes data and cannot be undone. This falls squarely into the Destructive category. The high severity reflects that deleting newsletters could impact email communications to subscribers and loss of marketing/communication records.
From the tool's definition Tool name is 'newsletters_delete' which indicates irreversible deletion of newsletter data. While the description is empty, the naming convention combined with sibling tools (newsletters_add, newsletters_browse) and the server's role managing Ghost CMS…
Documented attack patterns abuse exactly the kind of access newsletters_delete 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 newsletters_delete:
{
"version": "1",
"default": "deny",
"hide": [
"newsletters_delete"
]
}newsletters_delete disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
Free to start. No card required.
newsletters_delete. It is categorised as a Destructive tool in the Ghost MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Ghost MCP Server MCP server in PolicyLayer and add a rule for newsletters_delete: 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.
newsletters_delete is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the newsletters_delete 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 newsletters_delete. 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.
newsletters_delete is provided by the Ghost MCP Server MCP server (mfydev/ghost-mcp). 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.
42 Ghost MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.