List available subscription roles (Ludus 2.0 Enterprise only). Returns: List of subscription roles
AI agents call list_subscription_roles to retrieve information from Ludus FastMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a simple data retrieval operation—listing subscription roles—with no side effects, data modification, or external operations. It is a straightforward query that reads configuration or organizational data. The low severity reflects minimal risk even if accessed by an unauthorized agent, as it only exposes metadata about available roles without granting permissions or enabling further actions.
From the tool's definition Tool name 'list_subscription_roles' and description 'List available subscription roles' indicate a read-only query operation that retrieves and returns information without modification.
Documented attack patterns abuse exactly the kind of access list_subscription_roles gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ludus FastMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for list_subscription_roles:
{
"version": "1",
"default": "deny",
"tools": {
"list_subscription_roles": {}
}
}list_subscription_roles is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List available subscription roles (Ludus 2.0 Enterprise only). Returns: List of subscription roles. It is categorised as a Read tool in the Ludus FastMCP MCP Server, which means it retrieves data without modifying state.
Register the Ludus Fast MCP server in PolicyLayer and add a rule for list_subscription_roles: 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 Ludus FastMCP. Nothing to install.
list_subscription_roles 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 list_subscription_roles 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 list_subscription_roles. 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.
list_subscription_roles is provided by the Ludus Fast MCP server (tjnull/ludus-fastmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 201 Ludus FastMCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
201 Ludus FastMCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.