List groups with access to a blueprint. Args: blueprint_id: ID of the blueprint Returns: List of groups with access
AI agents call list_blueprint_access_groups 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 queries and retrieves information about access control groups associated with a blueprint. It performs no modifications, deletions, or execution of commands. The output is read-only data about access permissions, making it a Read category tool with low severity since disclosure of group membership information poses minimal risk compared to other cyber range management operations.
From the tool's definition Tool name contains 'list' and description states 'List groups with access to a blueprint' with return value 'List of groups with access'. This is a retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access list_blueprint_access_groups 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_blueprint_access_groups:
{
"version": "1",
"default": "deny",
"tools": {
"list_blueprint_access_groups": {}
}
}list_blueprint_access_groups is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List groups with access to a blueprint. Args: blueprint_id: ID of the blueprint Returns: List of groups with access. 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_blueprint_access_groups: 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_blueprint_access_groups 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_blueprint_access_groups 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_blueprint_access_groups. 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_blueprint_access_groups 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.
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201 Ludus FastMCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.