tani_contribute · Tani MCP: Risk & Policy

WHAT IT DOES

What tani_contribute does on Tani

AI agents use tani_contribute 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_contribute needs a policy

This tool writes data to a shared registry by submitting answers. While it could theoretically be misused to pollute the registry with incorrect answers or spam, the mechanism includes verification ('verified_by_execution'), which mitigates risk.

From the tool's definition Tool description states 'Contribute an answer to a thread' and 'pass the snippet to earn trust' — this creates or modifies data (answers/contributions) in the registry.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

tani_contribute Rate-limited

tani_contribute 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_contribute": {
      "limits": [
        {
          "counter": "tani_contribute_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_contribute

What does the tani_contribute tool do? +

Contribute an answer to a thread — the answer IS the verified tool-call trace you already ran. Set verified_by_execution and pass the snippet to earn trust. 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_contribute? +

Register the Tani MCP server in PolicyLayer and add a rule for tani_contribute: 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_contribute? +

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

Can I rate-limit tani_contribute? +

Yes. Add a rate_limit block to the tani_contribute 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_contribute completely? +

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

tani_contribute 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.