getBlockDetails

THE RISK

Low Risk

Why getBlockDetails needs a policy

The tool appears to query immutable blockchain block data and return details. Reading block information has no side effects and cannot modify state or authorize transactions. Confidence is moderate rather than high due to empty description, but the name and server context (wallet/blockchain interaction suite) clearly indicate read-only retrieval of historical blockchain data.

From the tool's definition Tool name 'getBlockDetails' and blockchain context indicate retrieval of block information from Ethereum network.

Documented attack patterns abuse exactly the kind of access getBlockDetails gives an agent:

POLICY

How to control getBlockDetails

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Ethers Wallet, and nothing reaches the server without passing your rules. This is the rule we recommend for getBlockDetails:

policy.json

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

getBlockDetails is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register MCP Ethers Wallet — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More MCP Ethers Wallet tools

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All 69 MCP Ethers Wallet tools →

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Go deeper

Roll out MCP under one policy → Per-person scoped tokens, one central policy, and full audit across every server your team connects.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →
PolicyLayer vs alternatives → How deterministic, per-call MCP policy compares with gateways, identity layers, and authorisation platforms.

FAQ

Questions about getBlockDetails

What does the getBlockDetails tool do? +

getBlockDetails. 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 getBlockDetails? +

Register the MCP Ethers Wallet MCP server in PolicyLayer and add a rule for getBlockDetails: 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 getBlockDetails? +

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

Can I rate-limit getBlockDetails? +

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

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

getBlockDetails 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.

Enforce policy on every MCP Ethers Wallet tool call.

Start from MCP Ethers Wallet, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →