[Feature Request] Support for defer_loading (Tool Search Tool) in Claude Code CLI

Feature Request

The Anthropic API supports defer_loading for MCP toolsets (per https://www.anthropic.com/engineering/advanced-tool-use):

{
  "type": "mcp_toolset",
  "mcp_server_name": "my-server",
  "default_config": {"defer_loading": true},
  "configs": {
    "critical_tool": {"defer_loading": false}
  }
}

Is there a plan to expose this configuration in Claude Code CLI settings?

Use Case

I have an MCP server with 50+ tools. Loading all tools every message uses significant context tokens.

With defer_loading, frequently-used tools stay loaded while others load on-demand.

Questions

1. Is this feature planned for Claude Code CLI?
2. If not, is there a recommended workaround?

Thank you!