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In this video, I discuss how Anthropic has addressed the issue of context window pollution caused by MCP server tool definitions. By using the new MCP tool search, you can dynamically load tools when needed, significantly reducing token usage. I explain how this new tool search works, its benefits, and step-by-step instructions for developers on both MCP clients and servers. I also share best practices for optimizing tool descriptions and highlight potential pitfalls. If you are an MCP developer or use MCP tools, this guide will help you make the most of your context window.
LINKS:
https://x.com/trq212/status/2011523109871108570
https://platform.claude.com/docs/en/agents-and-tools/tool-use/tool-search-tool
https://github.com/anthropics/claude-code/issues/7336
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TIMESTAMPS:
00:00 The biggest Issue with MCP
01:24 Understanding the Context Issue
01:56 How Tool Search Solves the Problem
03:09 Variants of Tool Search Mechanisms
05:04 Best Practices for Tool Descriptions
06:12 Client-Side Implementation Steps
08:42 When to Use Tool Search
09:13 Common Pitfalls to Avoid Read More Prompt Engineering
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