Implement Langroid Agent with MCP Tools

Implement the core Langroid agent. Define its initial state, message processing loop, and how it will use the LlamaIndex RAG pipeline to find relevant video scenes. Crucially, detail how you will implement MCP-enabled tool integration to interact with a simulated video player API (e.g., `skip_to_time(timestamp)`, `get_current_time()`). Provide code snippets for the agent's main logic and tool definitions.