mcp-server-architecture

mcp-server-architecture is a cursor rule for Codex from RalfHuesing/ComputeToAi. It costs 0 tokens per session (459 once invoked), scanned A, original, MIT.

Rules for designing MCP servers, including local communication, tool names, settings, documentation, working directories, and logging. MCP is a standard interface through which AI agents use application tools.

In plain words
What is it for?
Naming and describing tools, configuring local servers, exposing documentation to agents, organising plan data, and handling logs safely.
Why use it?
They make the server’s tools predictable and keep its settings, documentation, files, and logs consistent.

Cursor rule for Codex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add rules/ralfhuesing/computetoai/mcp-server-architecture
Clone the repo
git clone --depth 1 https://github.com/RalfHuesing/ComputeToAi

Made for: Codex.

Wrote 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.

agentmods badge for mcp-server-architecture

README.md
[![agentmods](https://agentmods.dev/badge/rules/ralfhuesing/computetoai/mcp-server-architecture.svg)](https://agentmods.dev/rules/ralfhuesing/computetoai/mcp-server-architecture)
Your own site
<a href="https://agentmods.dev/rules/ralfhuesing/computetoai/mcp-server-architecture"><img src="https://agentmods.dev/badge/rules/ralfhuesing/computetoai/mcp-server-architecture.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 459 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00459
Opus 5 $0.00000 $0.00230
Sonnet 5 $0.00000 $0.00092
Haiku 4.5 $0.00000 $0.00046

Measured 3d ago against content hash ffd9c0b3f0c6, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mcp-server-architecture 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 3d 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.

.agents/rules/mcp-server-architecture.mdc · 19 lines

What it actually says

MCP-Server-Architektur

Vollständige, verbindliche Fassung: Docs/02-Architektur-und-MCP.md. Kurzfassung:

  • Transport: stdio (Standard-Transport des MCP-Python-SDK), kein Netzwerkport, keine Authentifizierung.
  • Tool-Namenskonvention: MCP kennt keine verschachtelten Tool-Namensräume, die Hierarchie wird per Präfix abgebildet – core_ für Kern-Tools, Feature-Name als Präfix für Feature-Tools (z. B. finance_), calculations_ für Berechnungen-Tools.
  • Selbstbeschreibung: Tools/Parameter beschreiben sich über ihr Pydantic-Schema selbst; zusätzlich stellt der Server Docs/ als MCP-Resources bereit – keine zweite, separat gepflegte Doku für den Agenten (siehe living-documentation.mdc).
  • Settings-Datei: TOML, verweist u. a. auf das Arbeitsverzeichnis und das Logging-Level; Pfad standardmäßig plattformüblich, überschreibbar per Umgebungsvariable/Startargument. Generisches Beispiel unter examples/.
  • Arbeitsverzeichnis: Wurzel mit einem Unterordner je Plan (kopierbare Pläne, siehe Docs/00-Vision.md), nicht ein einzelner Plan-Ordner. Agent greift nie direkt auf diese Dateien zu, nur über Tools.
  • Logging: immer aktiv, gestuft – INFO ohne sensible Finanzwerte, DEBUG (nicht standardmäßig aktiv) mit vollständigen Tool-Parametern/-Ergebnissen. Ziel: <Arbeitsverzeichnis>/logs/, plattformüblicher Fallback vor dem Laden der Settings-Datei. Python-Standardbibliothek logging mit rotierenden Dateien, keine Zusatzpakete.

Bei Widerspruch zwischen dieser Kurzfassung und Docs/02 gilt Docs/02.

Changes

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.

  1. 3d ago First seen · 19 lines · 0 tokens per session scan A ffd9c0b3f0c6

Subscribe to this mod's changes

mcp-server-architecture is a cursor rule published in the GitHub repository RalfHuesing/ComputeToAi (0 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 459 tokens. 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.