preview_scenario
A read tool on the Ludus Fast MCP server.
This record as markdown: /tools/tjnull-ludus-fastmcp/preview-scenario.md
What preview_scenario does on Ludus FastMCP
AI agents call preview_scenario to retrieve information from Ludus FastMCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why preview_scenario is rated Low
The term 'preview' strongly indicates a read operation that retrieves and displays scenario information without modification. However, confidence is moderate (0.60) due to the empty description, which prevents confirmation of actual behavior. In the context of a cyber range management system, previewing would typically be non-destructive introspection.
From the tool's definition Tool named 'preview_scenario' with empty description. The name suggests a read-only operation to display or inspect a scenario before deployment.
Attacks that exploit this kind of access
The rule that runs preview_scenario safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Ludus FastMCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For preview_scenario, this is the rule to start with:
preview_scenario is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Ludus FastMCP, apply this rule, and every preview_scenario call is checked against it from then on.
Questions about preview_scenario
preview_scenario is a read tool on the Ludus Fast MCP server. 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 preview_scenario: 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.
preview_scenario 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 preview_scenario 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 preview_scenario. 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.
preview_scenario 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.
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