Clarify rules regarding voicebank artist entries

src/content/rules/base-voicebank-required.mdx

@@ -16,6 +16,13 @@ rationale:
 status: Active
 rule_context:
 mikumod_support: "False"
+excerpt: Specify the base voicebank if available.
 ---
 
-Base voicebank, if available, needs to be specified.
+If a voicebank is made from another voicebank, specify the original as the base voicebank on the entry.
+
+The "Base voicebank" field only appears when the "Artist type" is set to a voice synthesizer. You can find it on the edit page between "Associated artists" and "Voicebank release date".
+
+## Related links
+
+- [Artist entry editing § Base voicebank](/docs/artist-entry-editing#base-voicebank)

src/content/rules/voicebank-language-required.mdx

@@ -16,6 +16,13 @@ rationale:
 status: Active
 rule_context:
 mikumod_support: "Planned"
+excerpt: Specify the voicebank language if available.
 ---
 
-Voicebank language, if available, needs to be specified.
+If available, specify the available languages of a voicebank on the artist entry.
+
+The "Language(s)" field only appears when the "Artist type" is set to a voice synthesizer. You can find it on the edit page between "External links" and "Status".
+
+## Related links
+
+- [Artist entry editing § Language(s)](/docs/artist-entry-editing#languages)

src/content/rules/voicebank-picture-required.mdx

@@ -16,6 +16,20 @@ rationale:
 status: Active
 rule_context:
 mikumod_support: "Planned"
+excerpt: Specify the voicebank picture if available.
 ---
 
-Voicebank picture, if available, needs to be specified.
+import RuleEmbed from "@/components/markdown/RuleEmbed.astro";
+
+If available, specify a picture of a voicebank as the main picture of the artist entry.
+
+You can find the "Main picture" field on the edit page between "Aliases" and "Description" or [the creation/addition page](https://vocadb.net/Artist/Create).
+
+## Related rules
+
+<RuleEmbed ruleId={84} />
+
+## Related links
+
+- [Artist entry creation](/docs/artist-entry-creation)
+- [Artist entry editing § Main picture](/docs/artist-entry-editing#main-picture)

src/content/rules/voicebank-release-date-required.mdx

@@ -18,6 +18,13 @@ rule_context:
 mikumod_support: "True"
 automatically_fixed: "False"
 complete_validation: "True"
+excerpt: Specify the voicebank release date.
 ---
 
-Voicebank release date needs to be specified.
+Specify the release date of a voicebank on the artist entry.
+
+The "Voicebank release date" field only appears when the "Artist type" is set to a voice synthesizer. You can find it on the edit page between "Base voicebank" and "External links".
+
+## Related links
+
+- [Artist entry editing § Voicebank release date](/docs/artist-entry-editing#voicebank-release-date)