security_scan

THE RISK

Low Risk

Why security_scan needs a policy

This tool retrieves and analyzes data from conversation files to identify security issues. It has no side effects—it does not modify, delete, or execute actions on findings. While the results could inform destructive or corrective actions, the tool itself only reads and inspects.

From the tool's definition Tool performs scanning and analysis of conversation files to detect leaked secrets. The description uses 'Scan' and lists detection targets (AWS keys, API tokens, passwords, private keys, connection strings, JWTs) indicating inspection without modification.

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

POLICY

How to control security_scan

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

policy.json

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

security_scan 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 Claude Code Toolkit — 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

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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 security_scan

What does the security_scan tool do? +

Scan conversation files for leaked secrets (AWS keys, API tokens, passwords, private keys, connection strings, JWTs). It is categorised as a Read tool in the Claude Code Toolkit MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on security_scan? +

Register the Claude Code Toolkit MCP server in PolicyLayer and add a rule for security_scan: 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 Claude Code Toolkit. Nothing to install.

What risk level is security_scan? +

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

Can I rate-limit security_scan? +

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

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

security_scan is provided by the Claude Code Toolkit MCP server (asifkibria/claude-code-toolkit). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Claude Code Toolkit tool call.

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

CHECK YOUR STACK →