Function _extract_meta

src/mcp/server/runner.py:83–91

Lift `_meta` from raw params; `None` when absent or malformed, so context construction is independent of params validity.

(params: Mapping[str, Any] | None)

def _extract_meta(params: Mapping[str, Any] | None) -> RequestParamsMeta | None:
    """Lift `_meta` from raw params; `None` when absent or malformed, so
    context construction is independent of params validity."""
    if not params or "_meta" not in params:
        return None
    try:
        return RequestParams.model_validate(params, by_name=False).meta
    except ValidationError:
        return None


def otel_middleware(call_next: OnRequest) -> OnRequest: