use direct import

Author: matthewfranglen

docs/models/openai.md

@@ -184,7 +184,7 @@ The grammar can be written as either a regular expression:
 ```python
 from pydantic_ai import Agent
 from pydantic_ai.models.openai import OpenAIResponsesModel
-from pydantic_ai.tools import FunctionTextFormat
+from pydantic_ai import FunctionTextFormat
 
 model = OpenAIResponsesModel('gpt-5')  # (1)!
 agent = Agent(model)
@@ -203,7 +203,7 @@ Or as a [LARK](https://lark-parser.readthedocs.io/en/latest/how_to_use.html) gra
 ```python
 from pydantic_ai import Agent
 from pydantic_ai.models.openai import OpenAIResponsesModel
-from pydantic_ai.tools import FunctionTextFormat
+from pydantic_ai import FunctionTextFormat
 
 model = OpenAIResponsesModel('gpt-5')  # (1)!
 agent = Agent(model)
@@ -237,7 +237,7 @@ Freeform function calling, with or without a context free grammar, can be used w
 from pydantic_ai import Agent
 from pydantic_ai.models.openai import OpenAIResponsesModel
 from pydantic_ai.output import ToolOutput
-from pydantic_ai.tools import FunctionTextFormat
+from pydantic_ai import FunctionTextFormat
 
 sql_grammar_definition = r'''
 start: select_stmt