prepare_lido_stake

Build an unsigned Lido stake transaction (wraps ETH into stETH via stETH.submit). The tx's value field is the ETH amount to stake.

SERVERVaultPilot MCP SOURCEvaultpilot-mcp

Critical RISK CLASS

Category Financial

Parameters 22 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-szhygulin-vaultpilot-mcp/prepare-lido-stake.md

WHAT IT DOES

What prepare_lido_stake does on VaultPilot MCP

AI agents use prepare_lido_stake to commit financial operations through VaultPilot MCP, usually the final step of a payment, billing, or trading workflow. A call moves real money.

Parameter	Type	Required	Description
`wallet`	string	Yes
`amountEth`	string	Yes	Human-readable ETH amount, NOT raw wei. Example: "0.5" for 0.5 ETH.

Parameters from the server's own tool schema.

RISK

Why prepare_lido_stake is rated Critical

This tool constructs a transaction that commits real ETH into the Lido staking protocol, converting it to stETH. While it builds an 'unsigned' transaction, it directly prepares a financial operation that moves crypto assets (ETH) into a staking contract, committing financial obligations. On a self-custodial crypto MCP with Ledger signing, this is the direct precursor to an irreversible financial commitment.

From the tool's definition 'Build an unsigned Lido stake transaction (wraps ETH into stETH via stETH.submit). The tx's value field is the ETH amount to stake.'

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs prepare_lido_stake safely

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

prepare_lido_stake Approval-gated

Any call to prepare_lido_stake is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "prepare_lido_stake": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

GATE THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about prepare_lido_stake

What does the prepare_lido_stake tool do? +

Build an unsigned Lido stake transaction (wraps ETH into stETH via stETH.submit). The tx's value field is the ETH amount to stake. It is categorised as a Financial tool in the VaultPilot MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

What parameters does prepare_lido_stake accept? +

prepare_lido_stake accepts 2 parameters: wallet, amountEth. Required: wallet, amountEth. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on prepare_lido_stake? +

Register the VaultPilot MCP server in PolicyLayer and add a rule for prepare_lido_stake: 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 VaultPilot MCP. Nothing to install.

What risk level is prepare_lido_stake? +

prepare_lido_stake is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit prepare_lido_stake? +

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

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

prepare_lido_stake is provided by the VaultPilot MCP server (vaultpilot-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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