list_data_types

THE RISK

Low Risk

Why list_data_types needs a policy

This tool retrieves and queries information about data types present in a binary under analysis. It has no side effects, does not modify the binary, execute code, or delete anything. It is a straightforward informational lookup operation typical of reverse engineering analysis workflows. The low severity reflects minimal risk even if misused by an agent—querying metadata cannot cause harm.

From the tool's definition Tool name is 'list_data_types' and description states it 'List available data types in the binary' with filtering capabilities. The verb 'list' and the read-only nature of querying available data types without modification indicate pure data retrieval.

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

POLICY

How to control list_data_types

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 list_data_types:

policy.json

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

list_data_types 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 →

Free to start. No card required.

EXPLORE

Related tools and policies

More Kawaiidra MCP tools

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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 list_data_types

What does the list_data_types tool do? +

List available data types in the binary. Supports filtering by name substring and category path. 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 list_data_types? +

Register the Kawaiidra MCP server in PolicyLayer and add a rule for list_data_types: 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 list_data_types? +

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

Can I rate-limit list_data_types? +

Yes. Add a rate_limit block to the list_data_types 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 list_data_types completely? +

Set action: deny in the PolicyLayer policy for list_data_types. 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 list_data_types? +

list_data_types 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 →