SDK-aware API clients

When building or calling API client code, follow the SDK’s actual request/response types and conventions instead of assuming REST/dict semantics.

Apply these rules:

• Respect SDK object models: If a method constructs a typed proto/object (e.g., GenerateContentRequest), access fields using the proto/object APIs (e.g., request.contents) rather than dict helpers like .get(). This avoids runtime errors and preserves correct request shaping.
• Avoid hardcoding API version paths: Don’t blindly append "/v1" or force versioned endpoints when the SDK manages its own endpoint construction. Prefer passing base_url=None (or the SDK default) so internal path logic remains correct.
• Keep interface/parameter consistency: For API-like wrappers, maintain consistent function signatures/parameters (e.g., include limit where related functions accept it), so callers have a stable contract across providers.

Example (proto field access + SDK-managed endpoint):

from typing import Any

# Assume `request` is a proto/typed object created by the SDK
def inject_fields(request: Any) -> Any:
    # Proto repeated composite field: iterate directly; do not use request.get(...)
    for content in request.contents:
        for part in content.parts:
            # mutate request parts as required by the API
            pass
    return request

# When initializing provider clients, let the SDK handle endpoint construction
base_url = None  # e.g., instead of hardcoding /v1