diff --git a/src/dls_bluesky_core/core/types.py b/src/dls_bluesky_core/core/types.py
index 600310e..0e64e17 100644
--- a/src/dls_bluesky_core/core/types.py
+++ b/src/dls_bluesky_core/core/types.py
@@ -1,8 +1,37 @@
-from typing import Any, Callable, Generator
+from functools import wraps
+from typing import Any, Callable, Generator, Optional, TypeVar, TypedDict
 
 from bluesky import Msg
+from pydantic import BaseModel
 
 #  'A true "plan", usually the output of a generator function'
 MsgGenerator = Generator[Msg, Any, None]
 #  'A function that generates a plan'
 PlanGenerator = Callable[..., MsgGenerator]
+
+
+class SampleMetadata(BaseModel):
+    """Definition of schema relating to sample metadata."""
+
+    name: Optional[str]
+    chemical_formula: Optional[str]
+
+
+class MetadataWithSampleInfo(TypedDict, total=False):
+    sample: SampleMetadata
+
+
+T = TypeVar("T")
+
+
+def with_sample_information(
+    callable: Callable[..., T]
+) -> Callable[[..., Optional[SampleMetadata]], T]:
+    @wraps(callable, updated=["__dict__"])
+    def wrapped_callable(*args, **kwargs) -> T:
+        sample = kwargs.get("metadata", {}).get("sample", {})
+        sa = SampleMetadata(**sample)
+        kwargs.setdefault("metadata", {})["sample"] = sa
+        return callable(*args, **kwargs)
+
+    return wrapped_callable