Server initialize response update to last spec (add title, description) (#1634)

tests/server/fastmcp/test_server.py

@@ -20,6 +20,7 @@ from mcp.types import (
     BlobResourceContents,
     ContentBlock,
     EmbeddedResource,
+    Icon,
     ImageContent,
     TextContent,
     TextResourceContents,
@@ -29,9 +30,23 @@ from mcp.types import (
 class TestServer:
     @pytest.mark.anyio
     async def test_create_server(self):
-        mcp = FastMCP(instructions="Server instructions")
+        mcp = FastMCP(
+            title="FastMCP Server",
+            description="Server description",
+            instructions="Server instructions",
+            website_url="https://example.com/mcp_server",
+            version="1.0",
+            icons=[Icon(src="https://example.com/icon.png", mimeType="image/png", sizes=["48x48", "96x96"])],
+        )
         assert mcp.name == "FastMCP"
+        assert mcp.title == "FastMCP Server"
+        assert mcp.description == "Server description"
         assert mcp.instructions == "Server instructions"
+        assert mcp.website_url == "https://example.com/mcp_server"
+        assert mcp.version == "1.0"
+        assert isinstance(mcp.icons, list)
+        assert len(mcp.icons) == 1
+        assert mcp.icons[0].src == "https://example.com/icon.png"
 
     @pytest.mark.anyio
     async def test_normalize_path(self):

tests/server/fastmcp/test_title.py

@@ -10,6 +10,29 @@ from mcp.shared.metadata_utils import get_display_name
 from mcp.types import Prompt, Resource, ResourceTemplate, Tool, ToolAnnotations
 
 
+@pytest.mark.anyio
+async def test_server_name_title_description_version():
+    """Test that server title and description are set and retrievable correctly."""
+    mcp = FastMCP(
+        name="TestServer",
+        title="Test Server Title",
+        description="This is a test server description.",
+        version="1.0",
+    )
+
+    assert mcp.title == "Test Server Title"
+    assert mcp.description == "This is a test server description."
+    assert mcp.version == "1.0"
+
+    # Start server and connect client
+    async with create_connected_server_and_client_session(mcp._mcp_server) as client:
+        init_result = await client.initialize()
+        assert init_result.serverInfo.name == "TestServer"
+        assert init_result.serverInfo.title == "Test Server Title"
+        assert init_result.serverInfo.description == "This is a test server description."
+        assert init_result.serverInfo.version == "1.0"
+
+
 @pytest.mark.anyio
 async def test_tool_title_precedence():
     """Test that tool title precedence works correctly: title > annotations.title > name."""