permit2_nonce_used

Check whether a (owner, nonce) slot has been consumed.

SERVERTenzro Ledger MCP SOURCEhttps://canton-mcp.tenzro.network/mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/network-tenzro-tenzro/permit2-nonce-used.md

WHAT IT DOES

What permit2_nonce_used does on Tenzro Ledger MCP

AI agents call permit2_nonce_used to retrieve information from Tenzro Ledger MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why permit2_nonce_used is rated Low

This tool performs a simple lookup/query operation on nonce state to verify whether a permit has been used. It retrieves information (nonce consumption status) with no side effects, no code execution, no data modification, and no financial impact. It is defensive in nature—useful for validating permit validity before processing. This is characteristic of Read category operations.

From the tool's definition Tool description states 'Check whether a (owner, nonce) slot has been consumed' - a purely read operation that queries state without modifying or executing anything.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs permit2_nonce_used safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Tenzro Ledger MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For permit2_nonce_used, this is the rule to start with:

permit2_nonce_used Allowed

permit2_nonce_used is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "permit2_nonce_used": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Tenzro Ledger MCP, apply this rule, and every permit2_nonce_used call is checked against it from then on.

FAQ

Questions about permit2_nonce_used

What does the permit2_nonce_used tool do? +

Check whether a (owner, nonce) slot has been consumed. It is categorised as a Read tool in the Tenzro Ledger MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on permit2_nonce_used? +

Register the Tenzro Ledger MCP server in PolicyLayer and add a rule for permit2_nonce_used: 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 permit2_nonce_used? +

permit2_nonce_used is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit permit2_nonce_used? +

Yes. Add a rate_limit block to the permit2_nonce_used 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 permit2_nonce_used completely? +

Set action: deny in the PolicyLayer policy for permit2_nonce_used. 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 permit2_nonce_used? +

permit2_nonce_used 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.

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