Regex search across raw build output from the latest build.
AI agents call search_build_output to retrieve information from Unreal Editor without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and filters build output data using regex patterns. It does not create, modify, delete, or execute anything; it only searches and returns information from a log or output artifact. The blast radius of misuse is minimal (potential information disclosure of build logs), making it low severity. High confidence due to clear read-only semantics in the description.
From the tool's definition Tool performs "Regex search across raw build output" — a pure query/search operation with no modification, deletion, or execution capability. The description explicitly frames it as a search function over existing build data.
Attacks that exploit this kind of access
Regex search across raw build output from the latest build. It is categorised as a Read tool in the Unreal Editor MCP Server, which means it retrieves data without modifying state.
Register the Unreal Editor MCP server in PolicyLayer and add a rule for search_build_output: 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 Editor. Nothing to install.
search_build_output 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 search_build_output 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 search_build_output. 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.
search_build_output is provided by the Unreal Editor MCP server (tumourlove/deprecated-unreal-editor-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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