formatUnits

What formatUnits does on MCP Ethers Wallet

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

Why formatUnits is rated Low

formatUnits is a standard ethers.js utility that converts blockchain values to human-readable format. It performs no state changes, does not execute transactions, and has no destructive or financial implications. The low severity reflects that misuse would only produce incorrect output formatting, not data loss or unauthorized transactions.

From the tool's definition Tool name 'formatUnits' suggests a utility function for formatting numerical values (likely converting wei to readable Ether units). The empty description provides no evidence of side effects, data modification, or financial operations.

The rule that runs formatUnits safely

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

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

Questions about formatUnits