workflow_open · Tenzro Ledger MCP: Risk & Policy

WHAT IT DOES

What workflow_open does on Tenzro Ledger MCP

AI agents invoke workflow_open to trigger actions in Tenzro Ledger MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why workflow_open needs a policy

Opening and orchestrating a multi-agent saga workflow triggers external operations across multiple agents. Given the server context (payments, staking, bridges, agents), executing a workflow could have broad side effects. The description is truncated, reducing confidence, but 'multi-agent saga workflow' strongly implies coordinated execution of complex steps rather than a simple read or write.

From the tool's definition Open a multi-agent saga workflow. `saga_steps` is a list of

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

workflow_open Rate-limited

workflow_open stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "workflow_open": {
      "limits": [
        {
          "counter": "workflow_open_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 workflow_open

What does the workflow_open tool do? +

Open a multi-agent saga workflow. saga_steps is a list of. It is categorised as a Execute tool in the Tenzro Ledger MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on workflow_open? +

Register the Tenzro Ledger MCP server in PolicyLayer and add a rule for workflow_open: 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 workflow_open? +

workflow_open is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit workflow_open? +

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

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

workflow_open 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.