Scored across 4 tools
Each tool has a clearly distinct purpose: explain_artifact inspects without verifying, self_test runs a built-in test, verify_bundle checks multiple receipts, and verify_receipt checks a single artifact. No functional overlap.
Three tools follow a clear verb_noun pattern (explain_artifact, verify_bundle, verify_receipt), while self_test deviates as a noun-based name. This minor inconsistency is acceptable given the tool's special role.
With only 4 tools, the server is well-scoped for its verification purpose. Each tool serves a necessary function without redundancy, making the set efficient and focused.
The tool set covers core verification workflows: pre-verification inspection, self-test, single artifact verification, and bundle verification. A minor gap is the lack of a tool to verify multiple individual receipts without forming a bundle, but this is covered by verify_bundle assuming bundles are the primary use case.