Conciseness

The body is dense and assumes competence — tables for error modes, contexts, and use-case routing, with no beginner-level padding about what OpenTelemetry is. Not a 5 because there is minor repetition: the `propagate`-causes-data-loss warning is stated both in the error-modes table and again in the paragraph immediately below it, and the Coralogix exporter pattern in workflow 4 restates content already detailed in references/contexts.md.

Actionability

Every workflow ships complete, copy-paste-ready YAML (e.g., the histogram `extract_sum_metric`/`extract_count_metric` + filter block and the `merge_maps(attributes, ParseJSON(body), "insert")` example), and the error-patterns table maps exact Collector messages to root cause and first action. Not a 4 because the guidance is fully executable with no pseudocode gaps.

Workflow Clarity

The 7-step debug workflow is clearly sequenced with explicit check steps (confirm it's OTTL, match exact error text, check nil guards, check context prefix), and error_mode guidance acts as a protective checkpoint. Not a 5 because the destructive/batch operations (filter dropping telemetry, cardinality `keep_keys`) lack an explicit validate-the-outcome step — verification after a drop is only implied via the 'surface debug attributes' row of the error table.

Progressive Disclosure

The body is a well-organized overview that keeps core patterns inline and pushes depth to six one-level-deep reference files, all of which exist and are cited inline with descriptive pointers (verified: references/cardinality.md, contexts.md, filtering.md, processors.md, redaction.md, transformations.md, including deep anchors like processors.md#yaml-ottl-quoting-collision), plus a one-line-description footer index. Not a 4 because navigation, signaling, and content split are all clean with no buried or nested references.

Specificity

The description lists multiple specific concrete capabilities — "context selection, path expression mistakes (`attributes` vs `resource.attributes`), `error_mode`, cardinality reduction with `keep_keys`, JSON body handling with `ParseJSON`, PII redaction with `SHA256` / `replace_pattern`, and span naming" — with comprehensive coverage of the skill's domain. It is not a 4 because there are no minor gaps in capability coverage, and it stays in third-person voice throughout.

Completeness

It explicitly answers "what" (the named language plus an enumerated capability list) and "when" ("Use when writing or debugging OTTL statements in the transform processor, filter processor, or routing connector in any collector configuration") with concrete trigger phrases. Not a 4 because the 'when' clause is already fully explicit and specific rather than merely present.

Trigger Term Quality

Natural trigger phrases users would actually say are comprehensively covered: "writing or debugging OTTL statements", "transform processor", "filter processor", "routing connector", "collector configuration", plus concrete function/config names (`error_mode`, `keep_keys`, `ParseJSON`, `SHA256`). Not a 4 because both colloquial and technical synonyms of the domain are present with no obvious missing variations.

Distinctiveness Conflict Risk

The OTTL niche is distinct and the description adds an explicit negative boundary — "Not for receiver/exporter connectivity, DNS, pipeline wiring, or telemetry that never reaches the processor — those are infra problems, not OTTL problems" — which minimizes wrong-skill triggering. Not a 4 because the exclusion clause actively disambiguates against the closest overlapping infra topics.