This skill should be used when the user asks to implement, audit, or harden application-side handlers for Anthropic-defined Claude API client tools: memory, bash, text editor, or computer use; including sandboxing, path containment, command/action allowlists, session state, idempotency, tool_result construction, and execution evidence. Do not use it for Claude Code permissions, Anthropic server tools, MCP, Claude Code headless CLI, Agent SDK automation, or the generic Messages API tool loop.