get_function_xrefs

THE RISK

Low Risk

Why get_function_xrefs needs a policy

This tool queries existing cross-reference information about a function within a binary analysis context. It retrieves data (xrefs) that Ghidra has already analyzed without creating, modifying, deleting, or executing code. The action is purely informational and has no side effects on the binary or system state.

From the tool's definition Tool name 'get_function_xrefs' and description 'Get cross-references to and from a function' indicates retrieval of analysis metadata without modification or execution.

Documented attack patterns abuse exactly the kind of access get_function_xrefs gives an agent:

POLICY

How to control get_function_xrefs

PolicyLayer is an MCP gateway — it sits between your AI agents and Kawaiidra MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for get_function_xrefs:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_function_xrefs": {}
  }
}

get_function_xrefs is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Kawaiidra MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_function_xrefs

What does the get_function_xrefs tool do? +

Get cross-references to and from a function. It is categorised as a Read tool in the Kawaiidra MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_function_xrefs? +

Register the Kawaiidra MCP server in PolicyLayer and add a rule for get_function_xrefs: 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 Kawaiidra MCP. Nothing to install.

What risk level is get_function_xrefs? +

get_function_xrefs is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_function_xrefs? +

Yes. Add a rate_limit block to the get_function_xrefs 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.

How do I block get_function_xrefs completely? +

Set action: deny in the PolicyLayer policy for get_function_xrefs. 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.

What MCP server provides get_function_xrefs? +

get_function_xrefs is provided by the Kawaiidra MCP server (wagonbomb/kawaiidra-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Kawaiidra MCP tool call.

Start from Kawaiidra MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →