formatEther

A read tool on the MCP Ethers Wallet MCP server.

SERVERMCP Ethers Wallet SOURCEcrazyrabbitltc/mcp-ethers-server

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/crazyrabbitltc-mcp-ethers-server/formatether.md

WHAT IT DOES

What formatEther does on MCP Ethers Wallet

AI agents call formatEther 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.

RISK

Why formatEther is rated Low

formatEther is a pure utility function for converting/formatting blockchain numeric values. It reads data without modifying state, executing code with external side effects, deleting data, or moving funds. Even in a wallet context, formatting functions are non-destructive data operations. Confidence is slightly reduced due to the empty description, but the name strongly implies a read-only transformation.

From the tool's definition Tool name 'formatEther' suggests a utility function that converts or formats Ethereum values (likely wei to ether).

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs formatEther 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 formatEther, this is the rule to start with:

formatEther Allowed

formatEther 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": {
    "formatEther": {}
  }
}

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

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

FAQ

Questions about formatEther

What does the formatEther tool do? +

formatEther is a read tool on the MCP Ethers Wallet MCP server. It is categorised as a Read tool in the MCP Ethers Wallet MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on formatEther? +

Register the MCP Ethers Wallet MCP server in PolicyLayer and add a rule for formatEther: 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 MCP Ethers Wallet. Nothing to install.

What risk level is formatEther? +

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

Can I rate-limit formatEther? +

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

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

formatEther is provided by the MCP Ethers Wallet MCP server (crazyrabbitltc/mcp-ethers-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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