Use this skill to design, audit, or validate Claude Platform server-tool plans for server-tools, web search, web fetch, code execution, advisor, tool search, or the mechanical server-side portion of programmatic tool calling. It owns server_tool_use/result correlation, pause_turn continuation, versioned definitions, caller/container rules, domain controls, and source-supported privacy, retention, and cost controls. It does not own the application agent loop; route loop ordering and budgets to claude-api-tool-runtime and katas-deterministic-agent-loop.