Rename FastMCP to MCPServer (#1951)

tests/server/mcpserver/test_parameter_descriptions.py

@@ -0,0 +1,30 @@
+"""Test that parameter descriptions are properly exposed through list_tools"""
+
+import pytest
+from pydantic import Field
+
+from mcp.server.mcpserver import MCPServer
+
+
+@pytest.mark.anyio
+async def test_parameter_descriptions():
+    mcp = MCPServer("Test Server")
+
+    @mcp.tool()
+    def greet(
+        name: str = Field(description="The name to greet"),
+        title: str = Field(description="Optional title", default=""),
+    ) -> str:  # pragma: no cover
+        """A greeting tool"""
+        return f"Hello {title} {name}"
+
+    tools = await mcp.list_tools()
+    assert len(tools) == 1
+    tool = tools[0]
+
+    # Check that parameter descriptions are present in the schema
+    properties = tool.input_schema["properties"]
+    assert "name" in properties
+    assert properties["name"]["description"] == "The name to greet"
+    assert "title" in properties
+    assert properties["title"]["description"] == "Optional title"