Added mailboxes as local data sources (#1022)

app/MindWork AI Studio/Tools/Security/PromptInjectionSource.cs

@@ -15,4 +15,15 @@ public readonly record struct PromptInjectionSource(PromptInjectionSourceKind Ki
     public static PromptInjectionSource RetrievalContext(string dataSourceName, string path) => new(PromptInjectionSourceKind.RETRIEVAL_CONTEXT, $"{dataSourceName}: {path}");
 
     public static PromptInjectionSource DataSourceDescription(string dataSourceName) => new(PromptInjectionSourceKind.DATA_SOURCE_DESCRIPTION, dataSourceName);
+
+    /// <summary>
+    /// The content of the mails of one mailbox, its header fields included.
+    /// </summary>
+    /// <remarks>
+    /// Named after the mailbox alone, never after a mail: the label ends up in the log, which keeps
+    /// no subjects and no addresses. It also makes all mails of a mailbox one source, so a sync
+    /// which filtered ten mails reports one mailbox instead of ten mails.
+    /// </remarks>
+    /// <param name="mailboxName">The name of the mailbox.</param>
+    public static PromptInjectionSource MailContent(string mailboxName) => new(PromptInjectionSourceKind.MAIL_CONTENT, mailboxName);
 }