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.
git clone --depth 1 https://github.com/r-huijts/ethics-check-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/rules/r-huijts/ethics-check-mcp/mcp-integration)<a href="https://agentmods.dev/rules/r-huijts/ethics-check-mcp/mcp-integration"><img src="https://agentmods.dev/badge/rules/r-huijts/ethics-check-mcp/mcp-integration/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/rules/r-huijts/ethics-check-mcp/mcp-integration"><img src="https://agentmods.dev/badge/rules/r-huijts/ethics-check-mcp/mcp-integration.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 | $0.00000 | $0.00641 |
| Opus 5 | $0.00000 | $0.00320 |
| Sonnet 5 | $0.00000 | $0.00128 |
| Haiku 4.5 | $0.00000 | $0.00064 |
Grade A, and why
mcp-integration 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 — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MCP Integration Patterns
MCP Server Architecture
This project implements a Model Context Protocol (MCP) Server using the official MCP SDK. The server follows standard MCP patterns for tool registration and execution.
Core MCP Components
Server Initialization
- Server Instance: Created in src/index.ts with name "ethics-check" and version "0.1.0"
- Transport: Uses
StdioServerTransportfor communication with Claude Desktop - Capabilities: Declares
toolscapability to expose ethical oversight functions
Tool Registration Pattern
Tools are registered via ListToolsRequestSchema handler in src/index.ts:
{
name: "tool_name",
description: "Tool description for Claude",
inputSchema: {
type: "object",
properties: { /* JSON Schema */ },
required: ["required_fields"]
}
}
Tool Execution Pattern
Tool calls are handled via CallToolRequestSchema handler:
- Parameter Validation: Check required fields and types
- Input Transformation: Convert MCP args to typed interfaces
- Tool Execution: Call implementation function
- Response Formatting: Return structured markdown content
MCP-Specific Implementation Details
Input/Output Interfaces
Each tool defines TypeScript interfaces in src/tools/:
ToolNameInput: Parameters expected from MCP clientToolNameOutput: Structured response from tool logic- Conversion between MCP args and typed inputs happens in src/index.ts
Error Handling
- McpError: Use official MCP error types (
ErrorCode.InvalidParams,ErrorCode.MethodNotFound) - Validation: Check required parameters before tool execution
- Graceful Degradation: Fallback responses when AI parsing fails
Response Formatting
- Content Type: Always return
textcontent type - Markdown Format: Use structured markdown for readable responses
- Consistent Structure: Headers, sections, and formatting patterns across tools
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 · 68 lines · 0 tokens per session scan A 166b62962d40
mcp-integration is a cursor rule published in the GitHub repository r-huijts/ethics-check-mcp (5 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 641 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.
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