canton_grant_user_rights · Tenzro Ledger MCP: Risk & Policy

WHAT IT DOES

What canton_grant_user_rights does on Tenzro Ledger MCP

AI agents use canton_grant_user_rights 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 canton_grant_user_rights needs a policy

The name 'canton_grant_user_rights' strongly suggests this tool grants permissions or rights to users within a Canton (Daml/Canton ledger) system. Granting rights is a Write operation that modifies access control state. This carries high severity because misconfigured permissions could escalate privileges and expose sensitive financial/ledger data. Confidence is reduced due to the empty description.

From the tool's definition Tool name: canton_grant_user_rights — description is empty/uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

canton_grant_user_rights Rate-limited

canton_grant_user_rights 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": {
    "canton_grant_user_rights": {
      "limits": [
        {
          "counter": "canton_grant_user_rights_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 canton_grant_user_rights

What does the canton_grant_user_rights tool do? +

canton_grant_user_rights. 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 canton_grant_user_rights? +

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

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

Can I rate-limit canton_grant_user_rights? +

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

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

canton_grant_user_rights 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.