diff --git a/docs/guides/primitive-input-output.ipynb b/docs/guides/primitive-input-output.ipynb
index 87d56525492..9bb19b77b8d 100644
--- a/docs/guides/primitive-input-output.ipynb
+++ b/docs/guides/primitive-input-output.ipynb
@@ -759,7 +759,11 @@
    "source": [
     "## Result metadata\n",
     "\n",
-    "In addition to the execution results, both the `PrimitiveResult` and `PubResult` objects contain a metadata attribute about the job that was submitted. The metadata containing information for all submitted PUBs (such as the various [runtime options](/docs/api/qiskit-ibm-runtime/options) available) can be found in the `PrimitiveResult.metatada`, while the metadata specific to each PUB is found in `PubResult.metadata`."
+    "In addition to the execution results, both the `PrimitiveResult` and `PubResult` objects contain a metadata attribute about the job that was submitted. The metadata containing information for all submitted PUBs (such as the various [runtime options](/docs/api/qiskit-ibm-runtime/options) available) can be found in the `PrimitiveResult.metatada`, while the metadata specific to each PUB is found in `PubResult.metadata`.\n",
+    "\n",
+    "<Admonition type=\"note\">\n",
+    "In the metadata field, primitive implementations can return any information about execution that is relevant to them, and there are no key-value pairs that are guaranteed by the base primitive. Thus, the returned metadata might be different in different primitive implementations.\n",
+    "</Admonition> "
    ]
   },
   {