prepare_safe_tx_execute

SERVERVaultPilot MCP SOURCEvaultpilot-mcp

High RISK CLASS

Category Execute

Parameters 43 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-szhygulin-vaultpilot-mcp/prepare-safe-tx-execute.md

WHAT IT DOES

What prepare_safe_tx_execute does on VaultPilot MCP

AI agents invoke prepare_safe_tx_execute to trigger actions in VaultPilot MCP. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

Parameter	Type	Required
`chain`	string	—
`executor`	string	Yes
`safeTxHash`	string	Yes
`safeAddress`	string	Yes

Parameters from the server's own tool schema.

RISK

Why prepare_safe_tx_execute is rated High

This tool prepares and executes multisig transactions on a Safe smart contract that can move cryptocurrency and trigger arbitrary contract interactions. While it includes safeguards (threshold checks), it directly executes on-chain transactions with real financial consequences.

From the tool's definition Builds the final on-chain `execTransaction` UnsignedTx that lands a Safe multisig payload. Executes financial transactions on blockchain (EVM).

Attacks that exploit this kind of access

RECOMMENDED RULE

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

prepare_safe_tx_execute Rate-limited

prepare_safe_tx_execute stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "prepare_safe_tx_execute": {
      "limits": [
        {
          "counter": "prepare_safe_tx_execute_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT 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_safe_tx_execute call is checked against it from then on.

FAQ

Questions about prepare_safe_tx_execute

What does the prepare_safe_tx_execute tool do? +

Build the final on-chain execTransaction UnsignedTx that lands a Safe (Gnosis Safe) multisig payload. The executor doesn't need to have pre-approved on-chain — when msg.sender is an owner, the Safe contract treats their inline (r=msg.sender, s=0, v=1) signature as implicit consent. So one of the threshold "signatures" can be the executor themselves; the rest come from the on-chain approvedHashes registry filled by previous prepare_safe_tx_propose / prepare_safe_tx_approve calls. Refuses to build the tx when the threshold isn't met (which would just revert at execute time). Resolves the SafeTx body from the local store first, falling back to Safe Transaction Service. Returns an UnsignedTx the executor broadcasts via send_transaction — the OUTER tx sends 0 ETH (the inner value, if any, is paid by the Safe from its own balance during the inner CALL). It is categorised as a Execute tool in the VaultPilot MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

What parameters does prepare_safe_tx_execute accept? +

prepare_safe_tx_execute accepts 4 parameters: chain, executor, safeTxHash, safeAddress. Required: executor, safeTxHash, safeAddress. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on prepare_safe_tx_execute? +

Register the VaultPilot MCP server in PolicyLayer and add a rule for prepare_safe_tx_execute: 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_safe_tx_execute? +

prepare_safe_tx_execute is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit prepare_safe_tx_execute? +

Yes. Add a rate_limit block to the prepare_safe_tx_execute 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_safe_tx_execute completely? +

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

prepare_safe_tx_execute 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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