(SCHEMA) Address review comments.

Author: michaeltlombardi

schemas/src/extensions/manifest.discover.yaml

@@ -2,7 +2,7 @@
 $schema: https://json-schema.org/draft/2020-12/schema
 $id:     <HOST>/<PREFIX>/<VERSION>/extension/manifest.discover.yaml
 
-title: Get Method
+title: Discover operation command
 description: >-
   Defines how DSC must call the DSC extension to discover the paths to resource manifests.
 markdownDescription: | # VS Code only
@@ -18,8 +18,7 @@ markdownDescription: | # VS Code only
   manifests instead.
 
   If initial discovery finds any extension manifests that have the `discover` capability, DSC uses
-  those extensions to recursively discover resources that aren't available in `PATH` or
-  `DSC_RESOURCE_PATH`.
+  those extensions to discover resources that aren't available in `PATH` or `DSC_RESOURCE_PATH`.
 
   For more information about the output DSC expects the extension to emit for this command, see
   [Discover extension operation stdout][01].

schemas/src/extensions/manifest.yaml

@@ -2,7 +2,7 @@
 $schema: https://json-schema.org/draft/2020-12/schema
 $id:     <HOST>/<PREFIX>/<VERSION>/extension/manifest.yaml
 
-title: DSC resource manifest
+title: DSC extension manifest
 description: >-
   Defines the information DSC requires to process and surface a DSC extension.
 markdownDescription: | # VS Code only

schemas/src/extensions/stdout/discover.yaml

@@ -10,11 +10,16 @@ markdownDescription: | # VS Code only
   [_Online Documentation_][00]
   ***
 
-  Represents the full path a DSC resource manifest. DSC expects every JSON Line
-  emitted to stdout for the **Discover** operation to adhere to this schema. An extension indicates
-  that it supports the **Discover** operation by defining the [discover][01] field in its manifest.
+  Represents the full path a DSC resource manifest. DSC expects every JSON Line emitted to stdout
+  for the **Discover** operation to adhere to this schema. An extension indicates that it supports
+  the **Discover** operation by defining the [discover][01] field in its manifest.
 
-  The output must be a JSON object.
+  The output must be a JSON object that defines the `manifestPath` property.
+
+  If the extension doesn't discover any resources, it shouldn't emit any data to stdout.
+
+  Unless the extension raises an error, it should exit with code `0`, even when no resources are
+  discovered.
 
   [00]: <DOCS_BASE_URL>/reference/schemas/extension/stdout/discover?<DOCS_VERSION_PIN>
   [01]: <DOCS_BASE_URL>/reference/schemas/extension/manifest/discover?<DOCS_VERSION_PIN>