Using the file search tool, File Search store and response schema does not work. model answers only with text attribute, response is not parse, model states it canot answer questions about infromation in File Search store. Example:
from pydantic import BaseModel
class Response(BaseModel):
answer: str
files_used: list[str]
response_schema = Response.model_json_schema()
response = client.models.generate_content(
model="gemini-2.5-flash-lite",
contents="""What is the color. of the moon?""",
config=types.GenerateContentConfig(
system_instruction="Use for file search tool only to answer the question. you must always try to provide an answer from the files.",
tools=[
types.Tool(
file_search=types.FileSearch(
file_search_store_names=[store.name], top_k=10
)
)
],
response_mime_type="application/json",
response_schema=response_schema,
),
)
response.parsed -> None
reponse.text -> 'Here is the JSON requested:\n```json\n{\n "answer": "I need more information to answer your question....
W/o schema it works.