diff --git a/docs/specification.md b/docs/specification.md
index 382185a53..7fd159cc4 100644
--- a/docs/specification.md
+++ b/docs/specification.md
@@ -472,7 +472,7 @@ The `historyLength` parameter appears in multiple operations and controls how mu
 
 #### 3.2.5. Metadata
 
-A flexible key-value map for passing additional context or parameters with operations. Metadata keys and are strings and values can be any valid value that can be represented in JSON. [`Extensions`](#46-extensions) can be used to strongly type metadata values for specific use cases.
+A flexible key-value map for passing additional context or parameters with operations. Metadata keys must be strings, and values can be any valid JSON value. [Extensions](#46-extensions) can be used to strongly type metadata values for specific use cases.
 
 #### 3.2.6 Service Parameters