servers, tools, and the protocol — how ai agents plug into your stack

Build the client side of a tools/call. Write call_tool(name, arguments) that:

• Builds a request dict {"name": name, "arguments": arguments}.
• Passes it to the provided fake_server(request) (a stand-in for an MCP server).
• Reads the response. If isError is True, return the string "error". Otherwise return the text at response["content"][0]["text"].

Then call call_tool("greet", {"name": "alex"}) and print the result.

Expected output:

hello alex