Install subscription roles (Ludus 2.0 Enterprise only). Args: roles: List of role names to install Returns: Installation result
AI agents use install_subscription_roles to create or update resources in Ludus FastMCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ludus FastMCP environment.
This tool creates or installs subscription roles within the Ludus cyber range management system. It modifies system state by adding new roles (reversible through uninstall operations), fitting the Write category.
From the tool's definition Tool name 'install_subscription_roles' and description 'Install subscription roles' indicate a modification operation that creates or adds role configurations to the system.
Documented attack patterns abuse exactly the kind of access install_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 install_subscription_roles:
{
"version": "1",
"default": "deny",
"tools": {
"install_subscription_roles": {
"limits": [
{
"counter": "install_subscription_roles_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}install_subscription_roles 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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Install subscription roles (Ludus 2.0 Enterprise only). Args: roles: List of role names to install Returns: Installation result. It is categorised as a Write tool in the Ludus FastMCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Ludus Fast MCP server in PolicyLayer and add a rule for install_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.
install_subscription_roles 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 install_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 install_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.
install_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.