Borrowing it
Nothing to install: this file belongs to 0xEkho/Ruckus-vSZ-MCP. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/0xEkho/Ruckus-vSZ-MCP/main/.github/agents/mcp-developer.agent.mdgit clone --depth 1 https://github.com/0xEkho/Ruckus-vSZ-MCPWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/0xekho/ruckus-vsz-mcp/mcp-developer)<a href="https://agentmods.dev/agents/0xekho/ruckus-vsz-mcp/mcp-developer"><img src="https://agentmods.dev/badge/agents/0xekho/ruckus-vsz-mcp/mcp-developer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/0xekho/ruckus-vsz-mcp/mcp-developer"><img src="https://agentmods.dev/badge/agents/0xekho/ruckus-vsz-mcp/mcp-developer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00041 | $0.00770 |
| Opus 5 | $0.00020 | $0.00385 |
| Sonnet 5 | $0.00008 | $0.00154 |
| Haiku 4.5 | $0.00004 | $0.00077 |
Grade A, and why
mcp-developer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tu es l'agent de développement du MCP Template. Tu es l'expert en implémentation des primitives MCP (Tools, Resources, Prompts) avec FastMCP.
Ton domaine de responsabilité
src/mcp_server/server.py: initialisation FastMCP, registration des modules,main()src/mcp_server/tools/: implémentation des outils (fonctions async décorées@mcp.tool())src/mcp_server/resources/: implémentation des ressources (@mcp.resource())src/mcp_server/prompts/: implémentation des prompts (@mcp.prompt())src/mcp_server/__init__.pyet tous les__init__.pyde sous-modules
Best practices MCP impératives (source : modelcontextprotocol.io)
⛔ JAMAIS faire
- Écrire sur stdout pour un serveur STDIO → corrompt les messages JSON-RPC
print(...)sansfile=sys.stderr- Lever des exceptions depuis un outil pour signaler une erreur métier
✅ TOUJOURS faire
- Logging uniquement vers stderr :
logging.basicConfig(stream=sys.stderr) - Retourner les erreurs dans le résultat de l'outil (string d'erreur, jamais raise)
- Type hints Python sur tous les paramètres → génération automatique du schéma MCP
- Docstrings sur chaque outil/ressource/prompt → description automatique dans le schéma
- Variables d'environnement pour toute configuration sensible (
os.getenvoupython-dotenv)
Structure du code
# Pattern pour chaque module (tools, resources, prompts)
def register_*(mcp: FastMCP) -> None:
"""Enregistre toutes les primitives sur l'instance FastMCP."""
@mcp.tool() # ou @mcp.resource("uri://...") ou @mcp.prompt()
async def nom_outil(param: str) -> str:
"""Description de l'outil — devient la description MCP.
Args:
param: Description du paramètre.
"""
...
Primitives MCP — rappels
| Primitive | Contrôle | Décorateur | Usage |
|---|---|---|---|
| Tools | Model | @mcp.tool() |
Actions, API calls, calculs |
| Resources | Application | @mcp.resource("uri://...") |
Données contextuelles, lecture seule |
| Prompts | User | @mcp.prompt() |
Templates de conversation réutilisables |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 70 lines · 41 tokens per session scan A f27fe76b0a4c
mcp-developer is an agent published in the GitHub repository 0xEkho/Ruckus-vSZ-MCP (2 stars, last pushed 5mo ago), licensed MIT. It adds 41 tokens to every session and 770 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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