fix(ai): creation dossier+fichier en mode agent (BUG-050)

backend/tools/service.py

@@ -355,7 +355,12 @@ def list_recent(ctx: ToolContext, params: ListRecentInput) -> dict[str, Any]:
 
 @tool(
     name="create_file",
-    description="Create a new text file in a vault with optional initial content.",
+    description=(
+        "Create a new text file in a vault with optional initial content. "
+        "Parent directories are created automatically, so a single call with a "
+        "nested path (e.g. 'Folder/note.md') is enough to create a file inside "
+        "a new folder."
+    ),
     input_model=CreateFileInput,
     risk=ToolRisk.WRITE,
     requires_vault=True,
@@ -367,14 +372,18 @@ def create_file(ctx: ToolContext, params: CreateFileInput) -> dict[str, Any]:
 
 @tool(
     name="create_directory",
-    description="Create a new directory (and parents) in a vault.",
+    description=(
+        "Create a new directory (and parents) in a vault. Succeeds if it "
+        "already exists. Optional when creating a file: create_file already "
+        "creates parent directories."
+    ),
     input_model=CreateDirectoryInput,
     risk=ToolRisk.WRITE,
     requires_vault=True,
 )
 def create_directory(ctx: ToolContext, params: CreateDirectoryInput) -> dict[str, Any]:
-    """Create a vault directory."""
-    return _create_directory(params.vault, params.path)
+    """Create a vault directory (idempotent)."""
+    return _create_directory(params.vault, params.path, exist_ok=True)
 
 
 @tool(