chore: import upstream snapshot with attribution

examples/mcpserver/complex_inputs.py

@@ -0,0 +1,29 @@
+"""MCPServer Complex inputs Example
+
+Demonstrates validation via pydantic with complex models.
+"""
+
+from typing import Annotated
+
+from pydantic import BaseModel, Field
+
+from mcp.server.mcpserver import MCPServer
+
+mcp = MCPServer("Shrimp Tank")
+
+
+class ShrimpTank(BaseModel):
+    class Shrimp(BaseModel):
+        name: Annotated[str, Field(max_length=10)]
+
+    shrimp: list[Shrimp]
+
+
+@mcp.tool()
+def name_shrimp(
+    tank: ShrimpTank,
+    # You can use pydantic Field in function signatures for validation.
+    extra_names: Annotated[list[str], Field(max_length=10)],
+) -> list[str]:
+    """List all shrimp names in the tank"""
+    return [shrimp.name for shrimp in tank.shrimp] + extra_names