approve-token-spending

What approve-token-spending does on Xrpl mcp

AI agents use approve-token-spending 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.

Why approve-token-spending is rated Medium

Approving token spending establishes a trust line, which modifies account state on the ledger. This is a Write operation (creates/modifies data reversibly) rather than Execute because it does not run arbitrary code or trigger conditional external operations—it performs a well-defined ledger transaction. While it enables subsequent token transfers, the tool itself only sets permissions.

From the tool's definition Tool name 'approve-token-spending' and description 'Establish trust line to approve token usage' indicate creating or modifying a trust line on the XRP Ledger, which is a reversible ledger state change that enables token transfers.

The rule that runs approve-token-spending 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 approve-token-spending, this is the rule to start with:

{
  "version": "1",
  "default": "deny",
  "tools": {
    "approve-token-spending": {
      "limits": [
        {
          "counter": "approve-token-spending_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

Questions about approve-token-spending