Lists multiple specific concrete actions: 'Enrich an IOC', 'look up reputation and context', and specifies outputs: 'threat intel findings, SIEM entity summary, and IOC match status'. Also explicitly names the IOC types (IP, domain, hash, URL) and tools (GTI, SIEM).

Clearly answers both what ('Enrich an IOC with threat intelligence', 'Returns threat intel findings, SIEM entity summary, and IOC match status') and when ('Use when you need to look up reputation and context for an indicator using GTI and SIEM') with explicit trigger guidance.

Excellent coverage of natural terms users would say: 'IOC', 'IP', 'domain', 'hash', 'URL', 'threat intelligence', 'reputation', 'indicator', 'GTI', 'SIEM'. These are terms security analysts would naturally use when needing this capability.

Highly distinctive with clear niche in threat intelligence/security domain. Specific tool references (GTI, SIEM) and security-specific terminology (IOC, threat intel, reputation) make it unlikely to conflict with other skills.

The skill is lean and efficient, using tables for tool mappings and avoiding unnecessary explanations. Every section serves a clear purpose without explaining concepts Claude already knows.

Provides specific tool names, exact function signatures with parameters, and concrete examples for each IOC type. The workflow is copy-paste ready with clear tool invocations.

Steps are clearly sequenced (GTI → SIEM Entity → SIEM IOC Match), but lacks validation checkpoints between steps. No feedback loop for handling partial failures or verifying output quality before proceeding.

Well-organized with clear sections (Inputs, Workflow, Required Outputs, Quick Reference). For a skill of this size (~60 lines), the structure is appropriate without needing external file references.