Get the implementation source code for a class, function, or struct in the project.
AI agents call read_project_source to retrieve information from Unreal Project 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 source code from the indexed Unreal Engine project database. It performs a read-only operation that returns information about code structure and implementation without creating, modifying, deleting, or executing anything. The low severity reflects minimal blast radius—exposing source code visibility is a standard development activity with no destructive or operational impact.
From the tool's definition Tool name 'read_project_source' and description 'Get the implementation source code' indicate retrieval of existing code without modification. No side effects mentioned.
Attacks that exploit this kind of access
Get the implementation source code for a class, function, or struct in the project. It is categorised as a Read tool in the Unreal Project MCP Server, which means it retrieves data without modifying state.
Register the Unreal Project MCP server in PolicyLayer and add a rule for read_project_source: 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 Unreal Project. Nothing to install.
read_project_source 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 read_project_source 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 read_project_source. 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.
read_project_source is provided by the Unreal Project MCP server (tumourlove/deprecated-unreal-project-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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