diff --git a/app/MindWork AI Studio/Assistants/Builder/AssistantBuilder.razor b/app/MindWork AI Studio/Assistants/Builder/AssistantBuilder.razor
index 4b7f965e..dbde56e0 100644
--- a/app/MindWork AI Studio/Assistants/Builder/AssistantBuilder.razor	
+++ b/app/MindWork AI Studio/Assistants/Builder/AssistantBuilder.razor	
@@ -23,7 +23,7 @@
     </MudField>
     <MudJustifiedText Typo="Typo.body2" Class="mb-3">
         @(this.createChatLauncher
-            ? T("The direct chat launcher tile has no input form of its own. It opens a new chat right away, in the workspace you name below and with the provider, profile, chat template, and data sources you select there.")
+            ? T("The direct chat launcher tile has no input form of its own. It opens a new chat right away, with the provider, profile, chat template, and data sources you select below. Name a workspace for that chat, or leave the workspace empty to open a disappearing chat.")
             : T("The assistant asks users for input through a form and builds its own prompt from it."))
     </MudJustifiedText>
     @if (this.createChatLauncher)
@@ -39,8 +39,7 @@
                                     @bind-ProfileId="@this.launcherProfileId"
                                     @bind-ChatTemplateId="@this.launcherChatTemplateId"
                                     @bind-DataSourceIds="@this.launcherDataSourceIds"
-                                    @bind-ToolIds="@this.launcherToolIds"
-                                    ValidateWorkspaceName="@this.ValidateLauncherWorkspaceName"/>
+                                    @bind-ToolIds="@this.launcherToolIds"/>
         </MudPaper>
     }
 
diff --git a/app/MindWork AI Studio/Assistants/Builder/AssistantBuilder.razor.cs b/app/MindWork AI Studio/Assistants/Builder/AssistantBuilder.razor.cs
index e17d75cb..f129d464 100644
--- a/app/MindWork AI Studio/Assistants/Builder/AssistantBuilder.razor.cs	
+++ b/app/MindWork AI Studio/Assistants/Builder/AssistantBuilder.razor.cs	
@@ -375,14 +375,6 @@ public partial class AssistantBuilder : AssistantBaseCore<NoSettingsPanel>
         return null;
     }
 
-    private string? ValidateLauncherWorkspaceName(string workspaceName)
-    {
-        if (this.createChatLauncher && string.IsNullOrWhiteSpace(workspaceName))
-            return T("Please select or enter a workspace name for the chat launcher.");
-
-        return null;
-    }
-
     private async Task GenerateAssistantSpec()
     {
         await this.Form!.Validate();
@@ -589,7 +581,8 @@ public partial class AssistantBuilder : AssistantBaseCore<NoSettingsPanel>
     // The description stays required for both kinds of assistant. Users who only want a tile
     // usually flip the switch before typing anything, so the Builder offers a starting point they
     // can edit or replace. The workspace is picked after that, hence the suggestion is refreshed
-    // whenever the workspace changes:
+    // whenever the workspace changes — including when it is cleared again, which turns the tile
+    // into one that opens a disappearing chat:
     //
     private void SuggestLauncherDescription()
     {
@@ -597,8 +590,9 @@ public partial class AssistantBuilder : AssistantBaseCore<NoSettingsPanel>
             return;
 
         var suggestion = T("Create a tile that opens a preconfigured chat directly, without an input form of its own.");
-        if (!string.IsNullOrWhiteSpace(this.launcherWorkspaceName))
-            suggestion = $"{suggestion} {string.Format(T("Workspace: {0}"), this.launcherWorkspaceName.Trim())}";
+        suggestion = string.IsNullOrWhiteSpace(this.launcherWorkspaceName)
+            ? $"{suggestion} {T("The chat belongs to no workspace and disappears again.")}"
+            : $"{suggestion} {string.Format(T("Workspace: {0}"), this.launcherWorkspaceName.Trim())}";
 
         this.assistantDescription = suggestion;
         this.descriptionSuggestion = suggestion;
diff --git a/app/MindWork AI Studio/Components/DirectChatLauncherForm.razor b/app/MindWork AI Studio/Components/DirectChatLauncherForm.razor
index e1c432cf..af72de38 100644
--- a/app/MindWork AI Studio/Components/DirectChatLauncherForm.razor	
+++ b/app/MindWork AI Studio/Components/DirectChatLauncherForm.razor	
@@ -10,7 +10,15 @@
     </MudSelect>
 }
 
-<MudTextField T="string" Text="@this.WorkspaceName" TextChanged="@this.SetWorkspaceName" Validation="@this.ValidateWorkspaceName" AdornmentIcon="@Icons.Material.Filled.CreateNewFolder" Adornment="Adornment.Start" IconSize="Size.Small" Label="@T("Workspace name")" HelperText="@T("Choose an existing workspace or enter a name that should be created when the launcher is opened.")" Variant="Variant.Outlined" Margin="Margin.Dense" Class="mb-3" UserAttributes="@USER_INPUT_ATTRIBUTES"/>
+<MudTextField T="string" Text="@this.WorkspaceName" TextChanged="@this.SetWorkspaceName" AdornmentIcon="@(this.OpensTemporaryChat ? Icons.Material.Filled.Timer : Icons.Material.Filled.CreateNewFolder)" Adornment="Adornment.Start" IconSize="Size.Small" Label="@T("Workspace name (Optional)")" HelperText="@T("Choose an existing workspace or enter a name that should be created when the launcher is opened.")" Variant="Variant.Outlined" Margin="Margin.Dense" Class="mb-1" UserAttributes="@USER_INPUT_ATTRIBUTES"/>
+
+@* The tile behaves differently with and without a workspace, so the form says which of the two is
+   chosen right now instead of only explaining that both are possible. *@
+<MudText Typo="Typo.body2" Class="mud-text-secondary mb-3">
+    @(this.OpensTemporaryChat
+        ? T("Without a workspace, the tile opens a disappearing chat: it belongs to no workspace and is deleted according to your workspace maintenance settings.")
+        : T("The tile opens its chat in this workspace and creates the workspace when it does not exist yet."))
+</MudText>
 <MudSelect T="string" Value="@this.ProviderId" ValueChanged="@this.SetProviderId" Label="@T("Chat provider")" Variant="Variant.Outlined" Margin="Margin.Dense" Class="mb-3 rounded-lg" Adornment="Adornment.Start" AdornmentIcon="@Icons.Material.Filled.SmartToy">
     <MudSelectItem T="string" Value="@string.Empty">@T("Use chat default")</MudSelectItem>
     @foreach (var provider in this.SettingsManager.GetConfidentProviders(Components.CHAT))
diff --git a/app/MindWork AI Studio/Components/DirectChatLauncherForm.razor.cs b/app/MindWork AI Studio/Components/DirectChatLauncherForm.razor.cs
index e9c91f0a..bdd363ac 100644
--- a/app/MindWork AI Studio/Components/DirectChatLauncherForm.razor.cs	
+++ b/app/MindWork AI Studio/Components/DirectChatLauncherForm.razor.cs	
@@ -3,8 +3,9 @@ using Microsoft.AspNetCore.Components;
 namespace AIStudio.Components;
 
 /// <summary>
-/// The selection a direct chat launcher needs: the workspace its chat is created in, and the
-/// provider, profile, chat template, and data sources that chat starts with.
+/// The selection a direct chat launcher needs: the workspace its chat is created in — or no
+/// workspace, for a disappearing chat — and the provider, profile, chat template, and data sources
+/// that chat starts with.
 /// </summary>
 /// <remarks>
 /// The Assistant Builder uses this form to describe a launcher it is about to generate, while the
@@ -15,7 +16,8 @@ public partial class DirectChatLauncherForm : MSGComponentBase
 {
     /// <summary>
     /// The name of the workspace the launcher opens its chat in. The workspace is created when it
-    /// does not exist yet, hence this is a free-text field and not a workspace ID.
+    /// does not exist yet, hence this is a free-text field and not a workspace ID. An empty name is
+    /// a choice of its own: the launcher then opens a disappearing chat.
     /// </summary>
     [Parameter]
     public string WorkspaceName { get; set; } = string.Empty;
@@ -75,11 +77,9 @@ public partial class DirectChatLauncherForm : MSGComponentBase
     public EventCallback<HashSet<string>> ToolIdsChanged { get; set; }
 
     /// <summary>
-    /// Validates the workspace name. The hosts differ here: the Builder requires a name only while
-    /// its launcher switch is on, whereas the settings dialog always requires one.
+    /// Whether the launcher currently describes a chat without a workspace.
     /// </summary>
-    [Parameter]
-    public Func<string, string?>? ValidateWorkspaceName { get; set; }
+    private bool OpensTemporaryChat => string.IsNullOrWhiteSpace(this.WorkspaceName);
 
     private IReadOnlyList<WorkspaceTreeWorkspace> availableWorkspaces = [];
 
diff --git a/app/MindWork AI Studio/Dialogs/DirectChatLauncherSettingsDialog.razor b/app/MindWork AI Studio/Dialogs/DirectChatLauncherSettingsDialog.razor
index a7a82d72..1402f470 100644
--- a/app/MindWork AI Studio/Dialogs/DirectChatLauncherSettingsDialog.razor	
+++ b/app/MindWork AI Studio/Dialogs/DirectChatLauncherSettingsDialog.razor	
@@ -32,8 +32,7 @@
                                                 @bind-ProfileId="@this.profileId"
                                                 @bind-ChatTemplateId="@this.chatTemplateId"
                                                 @bind-DataSourceIds="@this.dataSourceIds"
-                                                @bind-ToolIds="@this.toolIds"
-                                                ValidateWorkspaceName="@this.ValidateWorkspaceName"/>
+                                                @bind-ToolIds="@this.toolIds"/>
                     </MudPaper>
                 </MudForm>
 
diff --git a/app/MindWork AI Studio/Dialogs/DirectChatLauncherSettingsDialog.razor.cs b/app/MindWork AI Studio/Dialogs/DirectChatLauncherSettingsDialog.razor.cs
index ef5ac332..3a7cb0ea 100644
--- a/app/MindWork AI Studio/Dialogs/DirectChatLauncherSettingsDialog.razor.cs	
+++ b/app/MindWork AI Studio/Dialogs/DirectChatLauncherSettingsDialog.razor.cs	
@@ -152,7 +152,9 @@ public partial class DirectChatLauncherSettingsDialog : MSGComponentBase
 
         //
         // An empty selection means "use the chat defaults" and is left out of the plugin, whereas
-        // the empty GUID explicitly selects no profile or no chat template:
+        // the empty GUID explicitly selects no profile or no chat template. Clearing the workspace
+        // name is a change of its own: the tile then opens a disappearing chat, and the writer
+        // switches the launch behavior accordingly.
         //
         return new(
             this.workspaceName.Trim(),
@@ -248,8 +250,6 @@ public partial class DirectChatLauncherSettingsDialog : MSGComponentBase
 
     private string? ValidateDescription(string value) => string.IsNullOrWhiteSpace(value) ? T("Please provide a description for this tile.") : null;
 
-    private string? ValidateWorkspaceName(string value) => string.IsNullOrWhiteSpace(value) ? T("Please select or enter a workspace name for this tile.") : null;
-
     private void Cancel() => this.MudDialog.Cancel();
 
     private static Guid? ParseOptionalGuid(string value) => Guid.TryParse(value, out var parsed) ? parsed : null;