Find all usage sites of a symbol (calls, includes, type references, etc.).
AI agents call find_references to retrieve information from Unreal Source without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves structural information about symbol usage from an indexed database without performing any side effects. It is analogous to grep or IDE symbol-finding features. The severity is low because misuse by an AI agent would be limited to accessing read-only information about code structure, posing no risk to system integrity, data modification, or execution.
From the tool's definition Tool name 'find_references' and description 'Find all usage sites of a symbol (calls, includes, type references, etc.)' indicate a query/retrieval operation.
Attacks that exploit this kind of access
Find all usage sites of a symbol (calls, includes, type references, etc.). It is categorised as a Read tool in the Unreal Source MCP Server, which means it retrieves data without modifying state.
Register the Unreal Source MCP server in PolicyLayer and add a rule for find_references: 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 Source. Nothing to install.
find_references 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 find_references 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 find_references. 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.
find_references is provided by the Unreal Source MCP server (tumourlove/deprecated-unreal-source-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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