I Built an AI Agent with Claude's Tool-Use Loop (Web Search, SQL, and More)

Short summary

A developer shares a practical build of an AI agent using Claude's tool-use loop, integrating web search, URL fetching, a safe calculator, read-only SQL, and file reading. The core pattern is simple: put Claude in a loop, let it pick tools, return results, and cap iterations. Includes security considerations like AST-only math parsing and sandboxed file access, plus a real five-step tool-chaining example.

• •Core pattern: Claude in a loop with tool schemas, results fed back until stop_reason changes
• •Tools include web search, URL fetching, safe calculator, read-only SQL, and sandboxed file reads
• •Security matters: AST-only math, read-only SQL, path traversal prevention

Generated with AI, which can make mistakes.