creating-mcp-servers

# Creating MCP Servers Build production-ready MCP servers using FastMCP v2 with optimal context efficiency through progressive disclosure patterns. ## Core Capabilities 1. **Apply the core patterns** - Four requirements for consistency 2. **Implement progressive disclosure** - Gateway patterns achieving 85-93% token reduction 3. **Optimize tool descriptions** - 65-70% token reduction through proper patterns 4. **Bundle servers** - Package as MCPB files with validation 5. **Proven gateway patterns** - Three complete implementations (Skills, API, Query) ## Architecture Decision ``` 1-3 simple tools? → Standard FastMCP with optimized tools Load: references/MANDATORY_PATTERNS.md 5+ related capabilities? → Gateway pattern (progressive disclosure) Load: references/PROGRESSIVE_DISCLOSURE.md Load: references/GATEWAY_PATTERNS.md Optimize existing server? → Apply mandatory patterns Load: references/MANDATORY_PATTERNS.md Package for distribution? → MCPB bundler Load: references/MCPB_BUNDLING.md Execute: scripts/create_mcpb.py Need FastMCP documentation? → Search references/LLMS_TXT.md for relevant URLs → Use web_fetch on gofastmcp.com URLs ``` ## Mandatory Patterns (Summary) Every implementation should meet these four requirements: 1. **uv (never pip)** - `uv pip install fastmcp` 2. **Optimized tool descriptions** - Annotations, Annotated, concise docstrings 3. **Authoritative documentation** - Fetch from gofastmcp.com via LLMS_TXT.md index 4. **App...