complex_inputs.py•685 B
"""
FastMCP Complex inputs Example
Demonstrates validation via pydantic with complex models.
"""
from typing import Annotated
from pydantic import BaseModel, Field
from mcp.server.fastmcp import FastMCP
mcp = FastMCP("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
