[FEATURE]: Support MCP-CLI for on-demand loading of MCP tools for reduced token consumption

[HyunggyuJang]

Feature hasn't been suggested before.

• [x] I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Ref: https://www.reddit.com/r/ClaudeAI/comments/1phxffj/mcpcli_is_an_experimental_approach_to_mcp_tool/, https://github.com/anthropics/claude-code/issues/12836#issuecomment-3629052941