Conciseness

The body is dense and API-specific with essentially no explanation of concepts Claude already knows, so it is clearly efficient — but the full create/wait/timeout reply JSONs and a few sentences (the Terms paragraph, "This is one normal HTTP call") carry more detail than the workflow strictly needs and could be trimmed. This sits at the efficient-with-minor-trimming anchor rather than the every-token-earns-its-place anchor.

Actionability

Every step is copy-paste executable: exact curl commands for creating, waiting (with `?timeout=25` and the `curl -m 35` guidance), and reading, real reply JSON with concrete field values, and precise error handling (429 `Retry-After`, 404 behavior, `next_url`/`resume` cursors). Coverage of the common cases is complete, matching the fully-executable anchor.

Workflow Clarity

The default workflow is a clearly sequenced get-URL → wait → report loop with explicit feedback and recovery checkpoints: timeout → GET `resume`, `more: true` → follow `next_url` immediately, repeated timeouts → ask the user whether to keep waiting, 429 → wait `Retry-After` and retry, 404 → re-ask for the URL. The skill is non-destructive so the missing-validation cap does not apply.

Progressive Disclosure

SKILL.md holds the core workflow while every deep-dive (field reference, sending test webhooks, signature verification, forwarding) lives in a real, one-level-deep references/ file, verified to exist, and is clearly signaled both inline at point of need and in the "Going further" table. This matches the clear-overview with well-signaled one-level-deep references anchor.

Specificity

The description lists several concrete actions — "Creates a URL with one HTTP call", "waits for webhooks to arrive", "reads their headers and exact bodies as JSON" — in third person with no vague filler. It falls short of the comprehensive anchor because sending test webhooks and checking signatures are bundle capabilities that appear only as trigger phrases, not stated actions, leaving a minor coverage gap.

Completeness

It explicitly answers what ("Creates a URL with one HTTP call, waits for webhooks to arrive, and reads their headers and exact bodies as JSON") and when ("Use when asked to get a webhook test URL… or when given an inspect.hookdeck.com URL") with concrete trigger phrases, matching the anchor exactly.

Trigger Term Quality

Trigger phrases are natural user language with synonyms covered: "get a webhook test URL", "see what a webhook sent", "wait or watch for a webhook", "debug a webhook payload or signature", "send test webhooks", plus the URL form "inspect.hookdeck.com URL" (the domain-equivalent of a file extension). This matches the comprehensive-coverage anchor.

Distinctiveness Conflict Risk

It names a clear niche ("Free webhook test URLs from Hookdeck Inspect, with no account or login"), has a distinct URL-based trigger, and explicitly routes adjacent use cases elsewhere ("For permanent webhook setups with connections, retries and an account, use event-gateway instead"), giving minimal conflict risk.