Use when building, extending, or debugging FastMCP v3 Python MCP servers — covers tools, resources, prompts, providers, transforms (including CodeMode and Tool Search), auth (MultiAuth, PropelAuth), client SDK, deployment (nginx reverse proxy), Prefab Apps, and testing. Grounded in local v3.1 docs — zero speculation.
99
Quality
100%
Does it follow best practices?
Impact
Pending
No eval scenarios have been run
Advisory
Suggest reviewing before use
Quality
Discovery
100%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is an excellent skill description that clearly defines its scope (FastMCP v3 Python MCP servers), provides comprehensive coverage of specific capabilities, and includes explicit trigger guidance at the beginning. The description is information-dense without being verbose, uses third person voice appropriately, and the 'zero speculation' qualifier adds credibility while distinguishing it from generic documentation skills.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete actions and components: 'building, extending, or debugging FastMCP v3 Python MCP servers' with detailed coverage of tools, resources, prompts, providers, transforms, auth systems, client SDK, deployment, Prefab Apps, and testing. | 3 / 3 |
Completeness | Clearly answers both what (covers tools, resources, prompts, providers, transforms, auth, client SDK, deployment, Prefab Apps, testing) AND when ('Use when building, extending, or debugging FastMCP v3 Python MCP servers') with explicit trigger guidance at the start. | 3 / 3 |
Trigger Term Quality | Excellent coverage of natural terms users would say: 'FastMCP', 'MCP servers', 'Python', 'tools', 'resources', 'prompts', 'CodeMode', 'Tool Search', 'MultiAuth', 'PropelAuth', 'nginx reverse proxy', 'Prefab Apps', 'testing', 'v3', 'v3.1'. | 3 / 3 |
Distinctiveness Conflict Risk | Highly distinctive with clear niche: specifically targets 'FastMCP v3 Python MCP servers' with version-specific documentation reference ('v3.1 docs'), unlikely to conflict with general Python or other server framework skills. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
100%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is an exemplary skill file that demonstrates best practices across all dimensions. It efficiently uses tables and flowcharts for decision-making, provides executable code examples, maintains clear navigation to detailed references, and respects token budget by assuming Claude's competence. The version gating section and v3 API corrections table are particularly valuable for preventing outdated pattern generation.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | Extremely lean and efficient. Uses tables, flowcharts, and minimal code examples without explaining concepts Claude already knows. Every section serves a clear purpose with no padding or unnecessary context. | 3 / 3 |
Actionability | Provides fully executable code examples (minimal server, composition, background task), concrete CLI commands, and specific API patterns. The trigger matrix gives exact file references for each use case. | 3 / 3 |
Workflow Clarity | The trigger matrix provides clear decision paths for user intent → feature → reference file. Mermaid flowcharts offer explicit decision trees for provider, transport, and auth selection with clear outcomes. | 3 / 3 |
Progressive Disclosure | Excellent structure with overview content in SKILL.md and 13+ well-organized reference files for deep dives. All references are one level deep with clear signaling (tables, explicit file paths, related skills section). | 3 / 3 |
Total | 12 / 12 Passed |
Validation
90%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 10 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
frontmatter_unknown_keys | Unknown frontmatter key(s) found; consider removing or moving to metadata | Warning |
Total | 10 / 11 Passed | |
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Table of Contents
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