Retrieves a list of newsletters from Ghost CMS with optional filtering.
AI agents call ghost_get_newsletters to retrieve information from Ghost MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads and returns newsletter data. It performs no creation, modification, deletion, or execution of code. The use of 'Retrieves' and 'filtering' confirms a safe read-only operation. Severity is low because unauthorized access to a newsletter list poses minimal risk—the data retrieved is typically non-sensitive metadata about newsletters rather than user credentials or financial information.
From the tool's definition Tool name 'ghost_get_newsletters' and description 'Retrieves a list of newsletters from Ghost CMS with optional filtering' indicate a query/retrieval operation with no modification or side effects.
Documented attack patterns abuse exactly the kind of access ghost_get_newsletters 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_get_newsletters:
{
"version": "1",
"default": "deny",
"tools": {
"ghost_get_newsletters": {}
}
}ghost_get_newsletters is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Retrieves a list of newsletters from Ghost CMS with optional filtering. It is categorised as a Read tool in the Ghost MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Ghost MCP Server MCP server in PolicyLayer and add a rule for ghost_get_newsletters: 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_get_newsletters is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the ghost_get_newsletters 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_get_newsletters. 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_get_newsletters 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.