Find all functions that call the given function.
AI agents call find_callers 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 metadata (call graphs) from a pre-indexed local database of Unreal Engine source code. It is a read-only query operation with no side effects. The user provides a function name and receives back a list of callers.
From the tool's definition Tool name 'find_callers' and description 'Find all functions that call the given function' indicate a query operation that retrieves call graph information from the indexed database.
Attacks that exploit this kind of access
Find all functions that call the given function. 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_callers: 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_callers 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_callers 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_callers. 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_callers 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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