mpt-authorize

Authorize an account to hold a Multi-Purpose Token (MPT), or as a holder, opt-in to hold an MPT. For MPTs with requireAuth flag, issuers must authorize holders before they can receive tokens.

SERVERXrpl mcp SOURCEromthpt/mcp-xrpl

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/romthpt-mcp-xrpl/mpt-authorize.md

WHAT IT DOES

What mpt-authorize does on Xrpl mcp

AI agents use mpt-authorize to create or update resources in Xrpl mcp, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Xrpl mcp environment.

RISK

Why mpt-authorize is rated Medium

This tool creates or modifies authorization records on the XRP Ledger—a reversible write operation. While it affects financial token holdings, it does not move money or commit financial obligations itself; it only grants permissions. The action is Write rather than Execute because it is a specific ledger state modification rather than arbitrary code execution.

From the tool's definition 'Authorize an account to hold a Multi-Purpose Token (MPT)' and 'opt-in to hold an MPT' indicate this tool modifies account state by granting authorization permissions.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mpt-authorize safely

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

mpt-authorize Rate-limited

mpt-authorize 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": {
    "mpt-authorize": {
      "limits": [
        {
          "counter": "mpt-authorize_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Xrpl mcp, apply this rule, and every mpt-authorize call is checked against it from then on.

FAQ

Questions about mpt-authorize

What does the mpt-authorize tool do? +

Authorize an account to hold a Multi-Purpose Token (MPT), or as a holder, opt-in to hold an MPT. For MPTs with requireAuth flag, issuers must authorize holders before they can receive tokens. It is categorised as a Write tool in the Xrpl 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 mpt-authorize? +

Register the Xrpl MCP server in PolicyLayer and add a rule for mpt-authorize: 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 Xrpl mcp. Nothing to install.

What risk level is mpt-authorize? +

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

Can I rate-limit mpt-authorize? +

Yes. Add a rate_limit block to the mpt-authorize 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 mpt-authorize completely? +

Set action: deny in the PolicyLayer policy for mpt-authorize. 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 mpt-authorize? +

mpt-authorize is provided by the Xrpl MCP server (romthpt/mcp-xrpl). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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