Conciseness

The body assumes Claude's competence (it never explains what n8n, a 401, or a credential is) and is dense with tool-specific semantics Claude cannot know ("workflowVersionId vs activeVersionId", "unreconstructable-context", "ranThroughNodeNames"). The write-safety rule is restated in several places ("Running one sends the message, charges the card, or deletes the row", "Mocked input does not make a write node safe", "The approval prompt alone is not consent"), which is deliberate emphasis but could be consolidated — efficient with minor trims, matching anchor 4 rather than anchor 3's genuinely unnecessary asides.

Actionability

Fully executable guidance with concrete invocations ("run_workflow_step(workflowId, nodeName, reuseExecutionId=<the failed execution>)", a complete toolArguments example, "get_resolved_node_parameters(executionId, nodeName)"), specific result fields ("failedExpressions", "emptyResolutions", "inputMode: 'mocked'"), and concrete decision rules (GET vs non-GET, safe-verb lists). The examples cover the common cases: auth errors, failed runs, wrong-output runs, tools, and sub-nodes.

Workflow Clarity

Explicit validation checkpoints and feedback loops run throughout: "Re-run the failing path ... and inspect the real result before responding", "Say what you checked before you say why it failed", the version check ("Only a row whose workflowVersionId equals workflow.activeVersionId ran the published code"), and "a new live run is what confirms the fix". The destructive-operation cap does not apply because the skill includes a full safety checklist ("Safe to run / Do not run for real / Unsure? Treat it as a write") and refused-replay recovery guidance; scenario-based rather than numbered organization suits a debugging skill.

Progressive Disclosure

Well-organized sections, core judgment rules correctly kept inline, and one clearly signaled external pointer ("read the workspace file knowledge-base/reference/trigger-input-data-shapes.md when a sandbox workspace is available"). It stops short of anchor 5 because the ~60-line "Running a tool" subsection is a specialized deep-dive that could live in a reference file and the ~243-line body is an operational manual rather than an overview — good structure with minor organization gaps, clearly above anchor 3's inlined-reference-material pattern.

Specificity

The what-clause names one concrete action ("Debug failed or wrong-output workflow executions using executions tools") but enumerates highly concrete failure modes — "unexpected node output", "empty parameter values after a successful run", "a node showing a red or failed expression error", "(for example a 401)" — which lifts it above anchor 3's bare 1-2 action listing. It falls short of anchor 5 because it does not list several distinct concrete operations.

Completeness

Explicitly answers both questions: what = "Debug failed or wrong-output workflow executions using executions tools"; when = "Load when the user reports execution failures ... Also load when a live run you started for the user fails ... before you explain the cause to the user." This matches anchor 5's pattern of a clear what plus explicit when-clauses with concrete trigger phrases.

Trigger Term Quality

Natural report phrases are comprehensively covered — "execution failures", "unexpected node output", "empty parameter values", "failed expression error", "a live run ... fails with an error ... (for example a 401)" — with synonyms (run/execution, failed/error) and concrete error examples. Anchor 4 ("a few natural terms missing") does not fit: common variations like wrong output, empty value, and node error are all present.

Distinctiveness Conflict Risk

It occupies a clear niche — debugging n8n workflow executions via executions tools — with failure-report-shaped triggers ("execution failures", "expression error", "401") that are distinct from a workflow-building skill's triggers, keeping conflict risk minimal as anchor 5 requires.