AI agents call ghost_list_tags to retrieve information from Ghost without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a read-only query to enumerate tags and their associated post counts. It has no side effects, does not modify or delete data, and does not execute arbitrary code. This is a straightforward data retrieval operation, making it the lowest-risk category.
From the tool's definition Tool name is 'ghost_list_tags' and description states 'List all Ghost tags with post counts' — this is a retrieval operation that queries existing data without modification.
Attacks that exploit this kind of access
List all Ghost tags with post counts. It is categorised as a Read tool in the Ghost MCP Server, which means it retrieves data without modifying state.
Register the Ghost MCP server in PolicyLayer and add a rule for ghost_list_tags: 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. Nothing to install.
ghost_list_tags 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_list_tags 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_list_tags. 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_list_tags is provided by the Ghost MCP server (uppinote20/ghost-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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