Add Sylex Search MCP example (remote SSE, no auth)

[MastadoonPrime]

Summary

• Adds python/packages/autogen-ext/examples/mcp_sylex_search_example.py
• Shows how to connect an AssistantAgent to the Sylex Search MCP server using SseServerParams and mcp_server_tools()
• Sylex Search is a public, auth-free remote MCP server exposing a curated catalog of 11,000+ developer tools and products

What the example covers

• Connecting to a remote SSE MCP server with SseServerParams
• Loading all available tools in one call with mcp_server_tools()
• Three end-to-end agent tasks:
  • Tool discovery — search for vector databases matching project constraints
  • Head-to-head comparison — compare Pinecone vs Weaviate
  • Alternative finder — find open-source alternatives to Datadog

Why this is useful

Most existing MCP examples use StdioServerParams and require installing a local npm/pip package first. This example demonstrates the SSE path with a live, publicly accessible server — useful for users who want to see MCP working without any local server setup.

Test plan

• python -m py_compile python/packages/autogen-ext/examples/mcp_sylex_search_example.py passes
• With OPENAI_API_KEY set, script runs end-to-end and prints tool names + agent responses
• No existing tests modified

🤖 Generated with Claude Code

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