Xanthe - MCP Developer AI Skill
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Xanthe - MCP Developer AI Skill
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// skill previewxanthe-mcp-tool-integration-engineer.md
# Xanthe - MCP & Tool Integration Engineer
## Who Xanthe Is
Drop Xanthe into Claude and get a Senior MCP & Tool Integration Engineer who
treats the tool layer as a product surface with its own API design discipline,
not as a thin wrapper someone generated from an OpenAPI spec on a Friday
afternoon. His core opinion is unpopular and correct: most "the model is
dumb" complaints are tool-design failures. A model that picks the wrong tool
is usually being shown eleven tools with overlapping names, descriptions
written for humans who already know the system, and enum-free string
parameters that make three tools look interchangeable. A model that loops is
usually getting a tool result with no signal about whether the call
succeeded, failed permanently, or should be retried. Xanthe fixes the
surface the model sees before anyone touches the prompt or upgrades the
model, because the tool surface is cheaper to change and it is where the
actual ambiguity lives.
Preview: lines 23 to 30 of 264 · Full file after purchase
or included in Unlimited Access
Use the name
Once the file is loaded, talk to it by name: “Serge, check this page.” That is what the name is for. It also keeps several skills apart in one chat.
Once the file is loaded, talk to it by name: “Serge, check this page.” That is what the name is for. It also keeps several skills apart in one chat.
// the skill your AI runs on
You are Xanthe, an MCP and Tool Integration Engineer who measures tool selection accuracy against a labeled intent set before touching the prompt. You have been activated to reshape the schemas, results and error codes the agent reads.
$4.92/mo, billed yearly. Works in Claude, ChatGPT, Claude Code, Codex and Cursor. Cancel anytime, 14-day refund on the first charge. After checkout we email your setup link.
Complete skill package instant downloadxanthe-mcp-tool-integration-engineer.md
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Ask Xanthe something hard.
Our agent picks the wrong tool half the time and sometimes charges a customer twice. Fix our tool layer.
CLAUDE · AS XANTHE, MCP DEVELOPER
Xanthe returns a tool-selection failure analysis, rewritten schemas with before and after call-accuracy numbers, an idempotency-key design for side-effecting tools, an auth-scoping model that closes the passthrough hole, and a tool-count reduction plan with the accuracy tradeoff stated.
Or have every skill inside your AI.
Questions before you buy? A person answers, usually the same day: hello@kissmyskills.com
// what's inside
What's inside this skill
- MCP server design and tool schema authoring
- Argument validation, idempotency and retry semantics
- Auth scoping and token passthrough hazards
- Tool-count budgeting and result shaping for context
Teams whose agents call the wrong tool, pass malformed arguments, or double-execute side effects.
What you're actually buying
Drop Xanthe into Claude and get a tool-layer engineer who designs tool schemas the model can actually call correctly, and secures what those tools can reach.
Xanthe owns the layer between an agent and the systems it acts on: Model Context Protocol server design, tool and function schema authoring that models call correctly on the first attempt, argument validation and coercion, idempotency and retry semantics for side-effecting tools, error surfaces the model can recover from, auth and token scoping so a tool cannot exceed its mandate, tool-count and description budgeting when selection accuracy starts degrading, and pagination and result shaping so a tool response does not blow the context window.
What you get
- →MCP server design and tool schema authoring
- →Argument validation, idempotency and retry semantics
- →Auth scoping and token passthrough hazards
- →Tool-count budgeting and result shaping for context
📄 xanthe-mcp-tool-integration-engineer.skill
Under 2 min install
Works with Claude, ChatGPT & any AI chat
How to install
Download the .skill package, open Claude, paste SKILL.md into your Project Instructions or system prompt, describe your requirement, and Xanthe builds the answer. Includes a full worked example so you see exactly what you get.
// how to install
Under 2 minutes
Four steps. Any AI chat.
- 01Download the file
After checkout, the download link lands in your inbox. Save the file anywhere on your device.
- 02Open your AI chat
Claude, ChatGPT, Gemini, Grok, or Copilot - whichever one you already use.
- 03Paste the file contents
Drop it into the system prompt, Project instructions, or custom instructions field.
- 04Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.
No technical knowledge required.
With Unlimited there is nothing to download. Connect your AI once, then just ask: "Load Xanthe from KissMySkills."
// faq
Questions about this product
What does the Xanthe skill do?+
Build the tool layer: MCP servers, callable schemas, safe auth scoping, and recoverable error surfaces. Load it once into Claude Projects and you get a configured MCP & Tool Integration Engineer without re-explaining context at the start of every session. Validate changes against a held-out eval set and real production traces before rolling out to all traffic.
How do I install this skill file?+
Download the .skill package (it contains SKILL.md), paste the contents into Claude Projects Instructions or your AI's system prompt, add your own context and start your first session. Works with Claude, ChatGPT, or any AI chat that accepts system prompts.
Which AI tools does this skill work with?+
Works with Claude (recommended), ChatGPT, Gemini, Perplexity and Copilot, and any AI chat that accepts system prompts. Claude Projects gives the best results.
What is included in this download?+
One .skill package delivered instantly after purchase: the full SKILL.md role configuration plus a worked-example file with a real scenario so you see the quality before you rely on it. Pay once, keep forever, yours permanently.
How is this different from using Claude without the Xanthe skill?+
Without a skill file your AI starts every session as a general assistant. With Xanthe loaded it applies MCP & Tool Integration Engineer methodology from the first message, with consistent quality every time. Validate changes against a held-out eval set and real production traces before rolling out to all traffic.
Do I have to read it myself?+
No. The file is written for your AI to read, not for you. Upload it or paste it in once and the AI takes on the role. After that you just ask it questions the way you normally would. You're welcome to open it and read it, but nothing here depends on you doing that.