verify_otp

THE RISK

Low Risk

Why verify_otp needs a policy

The tool's sole purpose is credential verification to gate access to encrypted personal information. While it controls access to sensitive data, the verification step itself is a prerequisite authentication control rather than a data operation. The actual retrieval is handled by sibling tools like 'batch_get_personal_info' which would be classified as Read.

From the tool's definition Tool name is 'verify_otp' and description states it 'Verify an OTP token to access encrypted personal data.' This is a verification/authentication mechanism that unlocks read access to data; it performs no data retrieval, modification, deletion, or execution…

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

POLICY

How to control verify_otp

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

policy.json

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

verify_otp 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 Personal Context 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 →

Free to start. No card required.

EXPLORE

Related tools and policies

More Personal Context MCP Server tools

Destructive delete_personal_info Delete specific personal information Execute disable_otp Disable OTP authentication and encryption for personal data. Execute lock_otp Immediately lock the current OTP session and block access to encrypted personal data. Requ Write batch_save_personal_info Save multiple pieces of personal information in a single request. More efficient than maki Write update_personal_info Update existing personal information Read batch_get_personal_info Retrieve multiple categories of personal information in a single request. Retrieve persona Read list_available_personal_info List all available personal information within current permissions Read otp_status Check the current OTP configuration status and whether OTP verification is required.

All 9 Personal Context MCP Server tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

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 verify_otp

What does the verify_otp tool do? +

Verify an OTP token to access encrypted personal data. Required before reading encrypted information. It is categorised as a Read tool in the Personal Context MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on verify_otp? +

Register the Personal Context MCP Server MCP server in PolicyLayer and add a rule for verify_otp: 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 Personal Context MCP Server. Nothing to install.

What risk level is verify_otp? +

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

Can I rate-limit verify_otp? +

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

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

verify_otp is provided by the Personal Context MCP Server MCP server (matipojo/personal-context-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Personal Context MCP Server tool call.

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

CHECK YOUR STACK →