Add a new member with email and subscription details
Part of the Ghost CMS MCP Server server.
Free to start. No card required.
AI agents use members_add to create or modify resources in Ghost CMS MCP Server. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call members_add repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Ghost CMS MCP Server.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"members_add": {
"limits": [
{
"counter": "members_add_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Ghost CMS MCP Server policy for all 44 tools.
These attack patterns abuse exactly the kind of access members_add gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Add a new member with email and subscription details. It is categorised as a Write tool in the Ghost CMS MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Ghost CMS MCP Server MCP server in PolicyLayer and add a rule for members_add: 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 CMS MCP Server. Nothing to install.
members_add 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 members_add 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 members_add. 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.
members_add is provided by the Ghost CMS MCP Server MCP server (hithereiamaliff/mcp-ghostcms). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 44 Ghost CMS MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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