verify_ledger_firmware

SERVERVaultPilot MCP SOURCEvaultpilot-mcp

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/io-github-szhygulin-vaultpilot-mcp/verify-ledger-firmware.md

WHAT IT DOES

What verify_ledger_firmware does on VaultPilot MCP

AI agents call verify_ledger_firmware to retrieve information from VaultPilot MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why verify_ledger_firmware is rated Low

This tool performs only data retrieval and validation operations. It reads device firmware information via a read-only APDU command (CLA=0xE0 INS=0x01) and compares it against a reference manifest. There are no side effects, no state changes, and no irreversible actions. The security risk is minimal—misuse would at worst return incorrect verification status, not compromise the device or funds.

From the tool's definition Tool is explicitly described as 'READ-ONLY firmware-pinning check' that 'Reads the connected Ledger's Secure Element firmware version + MCU bootloader version + device target_id' and 'asserts them against a hardcoded canonical manifest.' It performs no…

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

RECOMMENDED RULE

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

verify_ledger_firmware Allowed

verify_ledger_firmware 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": {
    "verify_ledger_firmware": {}
  }
}

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

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

FAQ

Questions about verify_ledger_firmware

What does the verify_ledger_firmware tool do? +

READ-ONLY firmware-pinning check (issue #325 P3). Reads the connected Ledger's Secure Element firmware version + MCU bootloader version + device target_id via the dashboard-level getDeviceInfo APDU (CLA=0xE0 INS=0x01), asserts them against a hardcoded canonical manifest covering Nano S Plus / Nano X / Stax / Flex. REQUIRES the device to be in DASHBOARD MODE — no app open. Ask the user to close every Ledger app (return to the dashboard / home menu) before calling. Returns one of: verified (firmware in known-good list), warn (at or above floor but not in known-good — likely a fresh Ledger release we haven't manifest-bumped; surface to user but proceed), below-floor (firmware below the supported floor — refuse signing until upgraded via Ledger Live Manager), unknown-device (target_id doesn't match any known model — too-new MCP / discontinued / counterfeit), wrong-mode (an app is open — close apps and retry), no-device (no Ledger over USB), error (unexpected failure). One USB round-trip; never throws — surfaces every failure as a structured verdict for the agent to relay. It is categorised as a Read tool in the VaultPilot MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on verify_ledger_firmware? +

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

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

Can I rate-limit verify_ledger_firmware? +

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

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

verify_ledger_firmware 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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