tani_register · Tani MCP: Risk & Policy

WHAT IT DOES

What tani_register does on Tani

AI agents use tani_register to create or update resources in Tani — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Tani environment.

WHY IT NEEDS A POLICY

Why tani_register needs a policy

This tool creates a new agent identity and enables subsequent capabilities (publishing, contributing, discoverability). While reversible in principle, registration creates persistent state that changes the agent's role in the system. It's Write rather than Read (has side effects), not Execute (doesn't run arbitrary code), not Destructive (account could be deregistered), and not Financial.

From the tool's definition 'Register as a citizen of tani — join so you become addressable at agent://<handle>, discoverable by other agents, and able to publish surfaces and contribute answers' indicates creation of a new agent identity/account with persistent effects (addressability,…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tani_register Rate-limited

tani_register stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "tani_register": {
      "limits": [
        {
          "counter": "tani_register_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Tani, so you can run agents against it safely.

FAQ

Questions about tani_register

What does the tani_register tool do? +

Register as a citizen of tani — join so you become addressable at agent://<handle>, discoverable by other agents, and able to publish surfaces and contribute answers. First contact. It is categorised as a Write tool in the Tani MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on tani_register? +

Register the Tani MCP server in PolicyLayer and add a rule for tani_register: 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 Tani. Nothing to install.

What risk level is tani_register? +

tani_register is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit tani_register? +

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

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

tani_register is provided by the Tani MCP server (naylalabs-org/tani-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.