get_two_factor_secret

THE RISK

Low Risk

Why get_two_factor_secret needs a policy

This tool retrieves sensitive authentication data (2FA secret and QR code) which are used for account security. While classified as Read (no data modification), the severity is high because exposure of 2FA secrets could compromise account security and enable unauthorized access. The confidence is 0.9 because the description clearly indicates a retrieval operation on security-critical data.

From the tool's definition Tool name 'get_two_factor_secret' and description 'Get a two-factor authentication secret and QR code' indicates retrieval of authentication credentials without modification or deletion.

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

POLICY

How to control get_two_factor_secret

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

policy.json

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

get_two_factor_secret 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 Linode MCP Server — 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_two_factor_secret

What does the get_two_factor_secret tool do? +

Get a two-factor authentication secret and QR code. It is categorised as a Read tool in the Linode MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_two_factor_secret? +

Register the Linode MCP Server MCP server in PolicyLayer and add a rule for get_two_factor_secret: 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 Linode MCP Server. Nothing to install.

What risk level is get_two_factor_secret? +

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

Can I rate-limit get_two_factor_secret? +

Yes. Add a rate_limit block to the get_two_factor_secret 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_two_factor_secret completely? +

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

get_two_factor_secret is provided by the Linode MCP Server MCP server (takashito/linode-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Linode MCP Server tool call.

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

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