join_as_participant · Tenzro Ledger MCP: Risk & Policy

WHAT IT DOES

What join_as_participant does on Tenzro Ledger MCP

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

WHY IT NEEDS A POLICY

Why join_as_participant needs a policy

This tool creates new resources (identity, wallet, hardware profile) on the Tenzro network. It is a Write operation because it provisions new data structures reversibly. The severity is high because it establishes identity and wallet infrastructure, which could be misused to create unauthorized accounts or impersonate entities, but it does not directly move funds or execute code.

From the tool's definition Join the Tenzro network as a participant. Provisions identity, wallet, and hardware profile.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

join_as_participant Rate-limited

join_as_participant 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": {
    "join_as_participant": {
      "limits": [
        {
          "counter": "join_as_participant_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 Tenzro Ledger MCP, so you can run agents against it safely.

FAQ

Questions about join_as_participant

What does the join_as_participant tool do? +

Join the Tenzro network as a participant. Provisions identity, wallet, and hardware profile. It is categorised as a Write tool in the Tenzro Ledger MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on join_as_participant? +

Register the Tenzro Ledger MCP server in PolicyLayer and add a rule for join_as_participant: 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 Tenzro Ledger MCP. Nothing to install.

What risk level is join_as_participant? +

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

Can I rate-limit join_as_participant? +

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

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

join_as_participant is provided by the Tenzro Ledger MCP server (https://canton-mcp.tenzro.network/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.