Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Prompt Suppressor (MCP) clean this prompt: 'You can browse the web and run code'"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
A standalone MCP server that enforces clean prompt structure, strips model‑invented instructions, and detects capability hallucinations before they propagate through your system.
This repository contains the full implementation and runs independently. It does not depend on the full suite.
Add this server to your MCP client configuration (Claude Desktop, Cursor, Windsurf, or any MCP‑compatible environment):
{
"mcpServers": {
"prompt_suppressor": {
"command": "python3",
"args": ["/path/to/mcp-prompt-suppressor/server.py"]
}
}
}
Related MCP server: mcp-doorman
- Removes model‑invented system instructions
- Normalises prompt structure
- Detects capability hallucinations
- Flags unsafe or structurally invalid prompt patterns
This suppressor is also included in the consolidated mcp-hallucination-suite, which bundles all four suppressors and provides a meta-orchestrator: https://github.com/steveswain14/mcp-hallucination-suite
mcp-json-suppressor
mcp-tool-response-suppressor
mcp-grounding-enforcer
This server cannot be deployed
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