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mcp-server-craft

Build MCP servers an agent can call. Use when designing tools, choosing stdio vs Streamable HTTP, or hardening an MCP server. It does not design a generic SDK (that's `sdk-craft`).

Quality

92%

Does it follow best practices?

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SecuritybySnyk

Passed

No findings from the security scan

SKILL.md
Quality
Evals
Security

Quality

Content

92%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

An exemplary instruction-only skill body: lean, phase-structured with explicit gates and checklists, and clean progressive disclosure into three well-scoped reference files that all exist. The only gap is the absence of a small inline worked example to ground the description-writing guidance.

DimensionReasoningScore

Conciseness

Every line is a directive or checkpoint; it never explains concepts Claude already knows (no 'what is MCP' padding) and uses tables and terse bullets so every token earns its place.

5 / 5

Actionability

Concrete, executable directives throughout ('Name tools `verb_noun`. Keep the full name at or under 64 characters', 'Return recoverable errors with `isError: true` and a next step', 'Use **stdio** for local desktop tools'), but the body includes no worked example (e.g., a sample what/returns/when tool description) to make the guidance copy-paste concrete.

4 / 5

Workflow Clarity

The Design → Build → Harden → Test phases are clearly sequenced with per-phase 'Done when:' criteria, explicit 'Phase gates' validation checkpoints between phases, and a closing quality checklist — matching the feedback-loop/checklist pattern the rubric rewards.

5 / 5

Progressive Disclosure

The body is a lean overview that clearly signals three one-level-deep references ('For naming, pointer wording, schemas, URIs, and anti-patterns, load `references/tool-design.md`' and parallels), each naming its contents and when to load it; all three referenced files exist in the bundle.

5 / 5

Total

19

/

20

Passed

Description

87%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong description: concrete capabilities, an explicit 'Use when' trigger clause, and explicit scope boundaries against a sibling skill. Keyword coverage is good but could add spelled-out synonyms for maximal trigger matching.

DimensionReasoningScore

Specificity

Names several concrete actions — 'Build MCP servers an agent can call', 'designing tools, choosing stdio vs Streamable HTTP, or hardening an MCP server' — but coverage has minor gaps (e.g., testing and resources are handled by the skill yet unmentioned).

4 / 5

Completeness

Explicitly answers both 'what' ('Build MCP servers an agent can call') and 'when' ('Use when designing tools, choosing stdio vs Streamable HTTP, or hardening an MCP server') with concrete trigger phrases.

5 / 5

Trigger Term Quality

Includes natural, domain-appropriate phrases users would say ('MCP server', 'designing tools', 'hardening', 'stdio', 'Streamable HTTP'), but misses common variations like the spelled-out 'Model Context Protocol' or 'transport'.

4 / 5

Distinctiveness Conflict Risk

Clear MCP-server niche with distinct triggers, and the explicit boundary 'It does not design a generic SDK (that's `sdk-craft`)' actively disambiguates from the closest related skill.

5 / 5

Total

18

/

20

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 16 / 16 Passed

Validation for skill structure

No warnings or errors.

Repository

saif-shines/devex-kit

Path

plugins/tooling/skills/mcp-server-craft/SKILL.md

Reviewed

Table of Contents

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