list_namespaces

THE RISK

Low Risk

Why list_namespaces needs a policy

This tool retrieves metadata (namespaces and classes) from an already-loaded binary for analysis purposes. It has no capability to modify, execute, delete, or commit financial operations. The operation is purely informational, consistent with the Read category for tools that query or enumerate data without side effects.

From the tool's definition Tool name 'list_namespaces' and description 'List all namespaces and classes in the binary' indicate a query/retrieval operation with no modification or side effects.

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

POLICY

How to control list_namespaces

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_namespaces:

policy.json

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

list_namespaces 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

Related tools and policies

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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_namespaces

What does the list_namespaces tool do? +

List all namespaces and classes in the binary. 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_namespaces? +

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

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

Can I rate-limit list_namespaces? +

Yes. Add a rate_limit block to the list_namespaces 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_namespaces completely? +

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

list_namespaces 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 →