jbvc/mcp-builder
Guide for creating high-quality MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. Use when building MCP servers to integrate external APIs or services, whether in Python (FastMCP) or Node/TypeScript (MCP SDK).
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Low
Low-risk findings worth noting
Low
Low-risk findings.
1 low severity finding. Worth noting, but not necessarily harmful.
W011: Third-party content exposure detected (indirect prompt injection risk).
What this means
The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.
Why it was flagged
The SKILL.md workflow explicitly instructs the agent to fetch and read public web pages (e.g., "https://modelcontextprotocol.io/sitemap.xml", raw GitHub URLs like https://raw.githubusercontent.com/modelcontextprotocol/... and the note "Use web search and WebFetch as needed"), so the agent will ingest untrusted, publicly‑hosted content that can materially influence implementation decisions and tool behavior.
- Audited
- Security analysis