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verify_ledger_live_codesign

Read-onlyIdempotent

Verifies the digital signature of the installed Ledger Live binary to confirm it is genuine and not tampered with. Supports macOS, Windows, and Linux.

Instructions

READ-ONLY codesign verification of the on-disk Ledger Live binary (issue #325 P4). Per-platform: macOS uses codesign --verify --deep --strict + Apple Team ID match; Windows uses PowerShell Get-AuthenticodeSignature + Subject substring match; Linux verifies the AppImage's embedded PGP signature is present (full key fingerprint pinning is a follow-up). Defaults to the platform's canonical install path; pass binaryPath to override (REQUIRED on Linux — no canonical AppImage location). Returns: verified (signature valid + matches Ledger), mismatch (signed by someone else — likely self-built / dev Ledger Live or a tampered binary), invalid (signature failed verification), not-found (no install at the expected path), platform-not-supported (Linux flatpak/snap/dpkg or unknown OS), tool-missing (codesign / powershell unavailable), error. NEVER refuses signing — surfaces the verdict for the agent to relay. Run after first install / Ledger Live update / OS update. Codesign tools take 100s of ms so this is NOT auto-fired on every signing call.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
binaryPathNoAbsolute path to the Ledger Live binary or app bundle. Optional on macOS / Windows (defaults to canonical install path). REQUIRED on Linux — pass the absolute path to your downloaded AppImage. flatpak / snap / dpkg installs aren't supported by this check; use your package manager's verify command instead.
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint, destructiveHint, idempotentHint, openWorldHint. The description adds significant behavioral context: per-platform verification methods, return values (verified, mismatch, etc.), and the fact that it 'NEVER refuses signing.' No contradiction with annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Description is relatively long but front-loaded with key info ('READ-ONLY codesign verification'). Per-platform details, return values, and usage notes are necessary. Could be slightly more concise, but no wasted content.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

No output schema, but description fully enumerates all return values. Covers all platforms, prerequisites, and performance. Sufficient for an agent to understand and invoke correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Input schema has 100% coverage for binaryPath. The description adds meaning: defaults to canonical path, REQUIRED on Linux, and explains why (no canonical AppImage location). This goes beyond the schema definition.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states it performs 'READ-ONLY codesign verification of the on-disk Ledger Live binary,' specifying the verb, resource, and action. It distinguishes itself from sibling verification tools (e.g., verify_ledger_attestation, verify_ledger_firmware) by focusing on codesign validation.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly states when to run: 'after first install / Ledger Live update / OS update.' Also notes performance: 'takes 100s of ms so this is NOT auto-fired on every signing call.' Does not explicitly mention when not to use or alternatives, but context is clear.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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