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9 changes: 9 additions & 0 deletions src/agentscope/_utils/_common.py
Original file line number Diff line number Diff line change
Expand Up @@ -257,6 +257,15 @@ def _remove_title_field(schema: dict) -> None:
schema["additionalProperties"],
)

# $defs — referenced sub-schemas, e.g. Pydantic models used as parameter
# types generate "$defs": {"SubModel": {"title": "SubModel", ...}}.
# These titles are auto-generated noise just like property titles, and
# should be removed for the same reason.
if "$defs" in schema and isinstance(schema["$defs"], dict):
for def_schema in schema["$defs"].values():
if isinstance(def_schema, dict):
_remove_title_field(def_schema)


def _create_tool_from_base_model(
structured_model: Type[BaseModel],
Expand Down
4 changes: 0 additions & 4 deletions tests/toolkit_basic_test.py
Original file line number Diff line number Diff line change
Expand Up @@ -472,12 +472,10 @@ def func_with_nested_model(a: MyBaseModel2) -> ToolResponse:
"properties": {
"c": {
"description": "Field c",
"title": "C",
"type": "integer",
},
},
"required": ["c"],
"title": "MyBaseModel1",
"type": "object",
},
"MyBaseModel2": {
Expand All @@ -490,12 +488,10 @@ def func_with_nested_model(a: MyBaseModel2) -> ToolResponse:
"items": {
"$ref": "#/$defs/MyBaseModel1",
},
"title": "B",
"type": "array",
},
},
"required": ["b"],
"title": "MyBaseModel2",
"type": "object",
},
},
Expand Down
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