Conciseness

The body is lean and assumes Claude's competence — it never explains basic concepts, uses compact tables and a tight schema-driven example, and every section earns its place; only minor boilerplate phrases recur.

Actionability

Provides a concrete question→capability mapping table, specific code-location heuristics, selection logic, and a parameterized illustrative call with a representative result — actionable guidance rather than abstract direction.

Workflow Clarity

A clearly sequenced six-step flow with explicit validation checkpoints ("If no executable location can be identified, do not capture; return the blocker...") and an error-handling table with feedback loops for stale/duplicate actions.

Progressive Disclosure

SKILL.md is an overview that signals a single one-level-deep reference (references/mcp-tool-discovery.md, a real file, linked with a section anchor), keeping shared discovery rules out of the main body.

Specificity

Lists multiple concrete capabilities — "current variable values, execution durations, hit counts, and value distributions" and "instrumenting running services" — matching the anchor for several specific concrete actions.

Completeness

Explicitly states both what it does ("Answer questions about live production system behavior... by instrumenting running services") and when to use it ("Use when the question requires live runtime data rather than static code analysis"), with explicit anti-triggers.

Trigger Term Quality

Embeds natural user phrasings such as "show recent requests to this endpoint", "what values appear for this expression in production?", and "which branch runs for customer X?" — the kind of phrases a user would actually say.

Distinctiveness Conflict Risk

Clear niche (live runtime data), explicit exclusions ("Do not use for incident diagnosis, pull-request review, code changes, setup, or deployment"), and routing to a sibling skill make conflict unlikely.