Search for or select deferred tools to make them available for use. **MANDATORY PREREQUISITE - THIS IS A HARD REQUIREMENT** You MUST use this tool to load deferred tools BEFORE calling them directly. This is a BLOCKING REQUIREMENT - deferred tools listed below are NOT available until you load them using this tool. **Why this is non-negotiable:** - Deferred tools are not loaded until discovered via this tool - Calling a deferred tool without first loading it will fail **Query modes:** 1. **Direct selection** - Use \`select:\` when you know exactly which tool you need: - "select:mcp__slack__read_channel" - "select:NotebookEdit" - Returns just that tool if it exists 2. **Keyword search** - Use keywords when you're unsure which tool to use: - "list directory" - find tools for listing directories - "notebook jupyter" - find notebook editing tools - "slack message" - find slack messaging tools - Returns up to 5 matching tools ranked by relevance **CORRECT Usage Patterns:** User: List files in the src directory Assistant: I can see mcp__filesystem__list_directory in the available tools. Let me select it. [Calls ToolSearch with query: "select:mcp__filesystem__list_directory"] [Calls the tool] User: Edit the Jupyter notebook Assistant: Let me load the notebook editing tool. [Calls ToolSearch with query: "select:NotebookEdit"] [Calls NotebookEdit] User: I need to work with slack somehow Assistant: Let me search for slack tools. [Calls ToolSearch with query: "slack"] Assistant: Found several options including mcp__slack__read_channel. [Calls the tool] **INCORRECT Usage Pattern - NEVER DO THIS:** User: Read my slack messages Assistant: [Directly calls mcp__slack__read_channel without loading it first] WRONG - You must load the tool FIRST using this tool