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.
npx agentmods add instructions/jodur/rdw-mcp/copilot-instructionsgit clone --depth 1 https://github.com/jodur/RDW-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/instructions/jodur/rdw-mcp/copilot-instructions)<a href="https://agentmods.dev/instructions/jodur/rdw-mcp/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/jodur/rdw-mcp/copilot-instructions.svg" alt="Measured on agentmods" 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 | $0.00312 | $0.00312 |
| Opus 5 | $0.00156 | $0.00156 |
| Sonnet 5 | $0.00062 | $0.00062 |
| Haiku 4.5 | $0.00031 | $0.00031 |
Grade C, and why
RDW-MCP copilot-instructions.md scanned grade C with 1 finding 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 4d 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- Use this file to provide workspace-specific custom instructions to Copilot. For more details, visit https://code.visualstudio.com/docs/copilot/copilot-customization#_use-a-githubcopilotinstructionsmd-file --> What it actually says
Copilot Instructions
This is an MCP (Model Context Protocol) server project for Dutch RDW vehicle registration data.
Project Guidelines
- This server provides tools to query Dutch vehicle registration database using RDW open data API
- Use TypeScript with strict typing throughout the project
- Follow MCP SDK patterns and best practices
- Implement proper error handling for API calls
- Use Zod for input validation and schema definitions
- Structure the code with proper separation of concerns
- Add comprehensive JSDoc comments for all functions and types
Key Features
- License plate lookup functionality
- Vehicle information retrieval (brand, model, fuel type, etc.)
- Technical specifications access
- Emissions and environmental data
- APK (MOT) inspection data
- Filtering and search capabilities
API Information
The server integrates with RDW (Rijksdienst voor het Wegverkeer) open data APIs:
- Base URL: https://opendata.rdw.nl/resource/
- Returns JSON data with vehicle registration information
- No authentication required for open data endpoints
References
- MCP SDK Documentation: https://github.com/modelcontextprotocol/create-python-server
- More info and examples at https://modelcontextprotocol.io/llms-full.txt
- RDW Open Data: https://opendata.rdw.nl/
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.
- 4d ago First seen · 38 lines · 312 tokens per session scan C a7ebe4b0fae8
RDW-MCP copilot-instructions.md is an instructions file published in the GitHub repository jodur/RDW-MCP (1 stars, last pushed 22d ago), licensed MIT. It adds 312 tokens to every session, about $0.0016 per session on Opus 5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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