Get subscribers for a specific mailing list.
AI agents call get_list_subscribers_tool to retrieve information from Listmonk MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves subscriber data from a mailing list without modifying, deleting, or executing any operations. It is a straightforward query operation that returns information. The severity is low because exposure of this tool would allow read-only access to subscriber lists—a data enumeration risk, but without capability to modify, delete, or execute changes.
From the tool's definition Tool name 'get_list_subscribers_tool' and description 'Get subscribers for a specific mailing list' indicate a retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access get_list_subscribers_tool gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Listmonk MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_list_subscribers_tool:
{
"version": "1",
"default": "deny",
"tools": {
"get_list_subscribers_tool": {}
}
}get_list_subscribers_tool is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get subscribers for a specific mailing list. It is categorised as a Read tool in the Listmonk MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Listmonk MCP Server MCP server in PolicyLayer and add a rule for get_list_subscribers_tool: 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 Listmonk MCP Server. Nothing to install.
get_list_subscribers_tool 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 get_list_subscribers_tool 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 get_list_subscribers_tool. 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.
get_list_subscribers_tool is provided by the Listmonk MCP Server MCP server (rhnvrm/listmonk-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 29 Listmonk MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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29 Listmonk MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.