CCA-F: Claude Certified Architect — Foundations

You are developing developer-productivity tools with the Claude Agent SDK. The agent assists engineers in exploring unfamiliar codebases, understanding legacy systems, generating boilerplate code, and automating repetitive tasks. It uses the built-in tools (Read, Write, Bash, Grep, Glob) and integrates with Model Context Protocol (MCP) servers.

After you add an MCP server containing specialized code-refactoring tools (extract_function, rename_variable, inline_function), you notice the agent still performs refactoring through basic text manipulation using Write and Bash sed commands. The MCP server is connected and healthy. On reviewing the configuration, you find that every MCP tool has only a minimal description, such as “extract_function: Extracts a function from code.”

What is the most effective way to increase adoption of the MCP refactoring tools?