create_blueprint
A write tool on the Ludus Fast MCP server.
This record as markdown: /tools/tjnull-ludus-fastmcp/create-blueprint.md
What create_blueprint does on Ludus FastMCP
AI agents use create_blueprint 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.
Why create_blueprint is rated Medium
Creating a blueprint is a write operation that adds a new asset to the Unreal project. While reversible (blueprints can be deleted), this is a creative modification of the project state. Severity is high because an agent could create malicious blueprints that execute arbitrary game logic or compromise the game build.
From the tool's definition Tool is named 'create_blueprint' and sits among sibling tools that modify Unreal Engine blueprints (add_component_to_blueprint, add_function_to_blueprint, compile_blueprint, etc.). The action creates a new blueprint artifact within the engine project.
Attacks that exploit this kind of access
The rule that runs create_blueprint 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 create_blueprint, this is the rule to start with:
create_blueprint 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.
The button opens the PolicyLayer dashboard: create your workspace, connect Ludus FastMCP, apply this rule, and every create_blueprint call is checked against it from then on.
Questions about create_blueprint
create_blueprint is a write tool on the Ludus Fast MCP server. 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 create_blueprint: 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.
create_blueprint 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 create_blueprint 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 create_blueprint. 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.
create_blueprint 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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