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c5ee465 457a7de c5ee465 a853a78 c5ee465 cf04a1f c5ee465 457a7de c5ee465 a853a78 c5ee465 cf04a1f c5ee465 a853a78 c5ee465 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 | from typing import Any
import pytest
from mcp.types import TextContent
from fastmcp import Client, FastMCP
from fastmcp.tools.tool import Tool
async def test_tool_exclude_args_in_tool_manager():
"""Test that tool args are excluded in the tool manager."""
mcp = FastMCP("Test Server")
@mcp.tool(exclude_args=["state"])
def echo(message: str, state: dict[str, Any] | None = None) -> str:
"""Echo back the message provided."""
if state:
# State was read
pass
return message
tools = mcp._tool_manager.list_tools()
assert len(tools) == 1
assert "state" not in echo.parameters["properties"]
async def test_tool_exclude_args_without_default_value_raises_error():
"""Test that excluding args without default values raises ValueError"""
mcp = FastMCP("Test Server")
with pytest.raises(ValueError):
@mcp.tool(exclude_args=["state"])
def echo(message: str, state: dict[str, Any] | None) -> str:
"""Echo back the message provided."""
if state:
# State was read
pass
return message
async def test_add_tool_method_exclude_args():
"""Test that tool exclude_args work with the add_tool method."""
mcp = FastMCP("Test Server")
def create_item(
name: str, value: int, state: dict[str, Any] | None = None
) -> dict[str, Any]:
"""Create a new item."""
if state:
# State was read
pass
return {"name": name, "value": value}
tool = Tool.from_function(
create_item,
name="create_item",
exclude_args=["state"],
)
mcp.add_tool(tool)
# Check internal tool objects directly
tools = mcp._tool_manager.list_tools()
assert len(tools) == 1
assert "state" not in tools[0].parameters["properties"]
async def test_tool_functionality_with_exclude_args():
"""Test that tool functionality is preserved when using exclude_args."""
mcp = FastMCP("Test Server")
def create_item(
name: str, value: int, state: dict[str, Any] | None = None
) -> dict[str, Any]:
"""Create a new item."""
if state:
# state was read
pass
return {"name": name, "value": value}
tool = Tool.from_function(
create_item,
name="create_item",
exclude_args=["state"],
)
mcp.add_tool(tool)
# Use the tool to verify functionality is preserved
async with Client(mcp) as client:
result = await client.call_tool(
"create_item", {"name": "test_item", "value": 42}
)
assert len(result) == 1
assert isinstance(result[0], TextContent)
# The result should contain the expected JSON
assert '"name": "test_item"' in result[0].text
assert '"value": 42' in result[0].text
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