ReActToolParser.get_tool_calls drops tool calls for zero-argument tools (falsy empty tool_params list)

ReActToolParser.get_tool_calls in client-sdks/openapi/templates/python/lib/agents/react/tool_parser.py silently drops any tool call for a tool that takes zero arguments.

The check is:

if tool_name and tool_params:
    call_id = str(uuid.uuid4())
    tool_calls = [
        ToolCall(
            call_id=call_id,
            tool_name=tool_name,
            arguments=json.dumps(params),
        )
    ]

tool_params is Action.tool_params: list[Param]. When the model emits a valid ReAct action for a tool that has no parameters, tool_params is [], which is falsy in Python. tool_name and tool_params then evaluates to False even though tool_name is set and the action parsed correctly, so the whole if block is skipped and get_tool_calls returns an empty list.

The caller has no way to distinguish this from "the model did not call a tool" - the method returns [] in both cases. A zero-argument tool call (for example list_files() or get_current_time()) is silently discarded.

Repro

from lib.agents.react.tool_parser import ReActToolParser, ReActOutput, Action
from lib.types import CompletionMessage

output = CompletionMessage(content=ReActOutput(
    thought="I should list the files",
    action=Action(tool_name="list_files", tool_params=[]),
    answer=None,
).model_dump_json())

parser = ReActToolParser()
print(parser.get_tool_calls(output))  # [] - expected one ToolCall for list_files

Expected: a ToolCall for list_files with empty arguments ("{}"). Actual: an empty list, as if the model produced no action at all.

Fix: check tool_name is not None (or react_output.action is not None, which is already checked one line above) instead of the truthiness of tool_params. tool_params being [] is a valid, empty-but-present value, not a missing one.