The Overview explains concepts Claude already knows ('The MITRE ATT&CK Navigator is a web application for annotating and visualizing ATT&CK matrices') and the 'When to Use' bullets are templated and somewhat circular ('When investigating security incidents that require analyzing threat actor ttps with mitre navigator'). It is mostly efficient but includes unnecessary explanation, so it is not the lean level-3 anchor.

The five Steps are abstract descriptions ('Query ATT&CK STIX data for target threat group using attackcti') with no executable code or commands, and the bundled scripts/agent.py is never referenced; this matches the 'describes rather than instructs' anchor, not level 2 which requires at least some concrete or pseudocode guidance.

Five steps are listed in a clear sequence but lack validation checkpoints or feedback loops for the generate-and-compare workflow, matching the 'sequence present but checkpoints missing' anchor; it is above level 1 because the ordering is explicit.

The body is organized into sections but the existing bundle files (references/api-reference.md and scripts/agent.py) are not referenced or signaled anywhere, so navigation to the detail materials is missing. It is not level 3 because the one-level-deep references are not clearly signaled, and not level 1 because the body itself is sectioned rather than a monolithic wall.

Lists multiple concrete actions in third person: 'queries STIX/TAXII data for group-technique associations, generates Navigator layer files for visualization, and compares defensive coverage against adversary profiles'. This matches the multiple-specific-actions anchor and is not the level below, which only names a domain and some actions.

It explicitly answers both what ('Map...TTPs to the MITRE ATT&CK framework...queries...generates...compares') and when (the explicit 'Activates for requests involving...' trigger clause), satisfying the explicit-triggers anchor; not level 2 because the 'when' is explicit rather than implied.

The 'Activates for requests involving APT TTP mapping, ATT&CK Navigator layers, threat actor profiling, or MITRE technique coverage analysis' clause gives good coverage of natural terms an analyst would say, not just technical jargon; it is above level 2 (which lacks common variations).

Tightly scoped to the MITRE ATT&CK / Navigator / attackcti niche with distinct triggers, making conflict with unrelated skills unlikely; it is clearly above the level-2 anchor where overlap with similar skills remains.