AI agents use tiers_add 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.
The 'add' suffix combined with the Ghost CMS context indicates this tool creates new tier records, which is a reversible write operation. Without an explicit description, confidence is moderate rather than high. It could potentially be financial in nature if tiers directly control pricing, but the primary action is data creation rather than financial transaction execution.
From the tool's definition Tool name 'tiers_add' indicates creation of new tiers (likely pricing/membership tiers in Ghost CMS). The naming convention matches sibling tools like 'invites_add', 'members_add', 'newsletters_add' which are all Write operations.
Documented attack patterns abuse exactly the kind of access tiers_add 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 tiers_add:
{
"version": "1",
"default": "deny",
"tools": {
"tiers_add": {
"limits": [
{
"counter": "tiers_add_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}tiers_add 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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tiers_add. 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 tiers_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 MCP Server. Nothing to install.
tiers_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 tiers_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 tiers_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.
tiers_add 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.
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42 Ghost MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.