prepare_marinade_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-marinade-stake.md

WHAT IT DOES

What prepare_marinade_stake does on VaultPilot MCP

AI agents use prepare_marinade_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	Solana wallet that funds the deposit and receives mSOL. Must have an initialized durable-nonce account (prepare_solana_nonce_init) and enough SOL to cover the d
`amountSol`	string	Yes	Human-readable SOL amount to stake (e.g. "1.5"). Decimals are SOL-native (9 dec); the builder rounds down to lamport precision.

Parameters from the server's own tool schema.

RISK

Why prepare_marinade_stake is rated Critical

This tool builds a transaction that commits real SOL into a DeFi staking protocol (Marinade Finance) in exchange for mSOL. This constitutes a financial commitment — locking up SOL assets into a liquid staking position. While the tx is unsigned at build time, its purpose is to execute a financial operation on-chain involving crypto assets.

From the tool's definition deposit `amountSol` SOL into Marinade and receive mSOL (Marinade's liquid-staking token)

Attacks that exploit this kind of access

RECOMMENDED RULE

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

prepare_marinade_stake Approval-gated

Any call to prepare_marinade_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_marinade_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_marinade_stake call is checked against it from then on.

FAQ

Questions about prepare_marinade_stake

What does the prepare_marinade_stake tool do? +

Build an unsigned Marinade stake tx: deposit amountSol SOL into Marinade and receive mSOL (Marinade's liquid-staking token). Uses the Marinade SDK's marinade.deposit so the on-chain Authorized signer is the user's wallet — no ephemeral keypair, Ledger-compatible. The mSOL ATA is created automatically on first stake (~0.002 SOL ATA rent, reclaimable). DURABLE NONCE REQUIRED — the wallet must have run prepare_solana_nonce_init first; otherwise this tool errors. BLIND-SIGN on Ledger (Marinade's program is not in the Solana app's clear-sign registry) — match the Message Hash on-device after preview_solana_send. 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_marinade_stake accept? +

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

How do I enforce a policy on prepare_marinade_stake? +

Register the VaultPilot MCP server in PolicyLayer and add a rule for prepare_marinade_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_marinade_stake? +

prepare_marinade_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_marinade_stake? +

Yes. Add a rate_limit block to the prepare_marinade_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_marinade_stake completely? +

Set action: deny in the PolicyLayer policy for prepare_marinade_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_marinade_stake? +

prepare_marinade_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.

KEEP EXPLORING

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