chore: auto-commit (2 archivos)

- backend/mcp.go
- backend/tools.go

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

backend/mcp.go

@@ -254,6 +254,31 @@ func mcpToolDefs() []infra.MCPToolDef {
 				"required": []string{"id"},
 			}),
 		},
+		{
+			Name:        "add_comment",
+			Description: "Anade un comentario (card_message) a una tarjeta. Requiere card_id, body y autor (author_id o author_username). Devuelve el CardMessage creado.",
+			InputSchema: rawSchema(map[string]any{
+				"type": "object",
+				"properties": map[string]any{
+					"card_id":         map[string]any{"type": "string"},
+					"body":            map[string]any{"type": "string"},
+					"author_id":       map[string]any{"type": "string"},
+					"author_username": map[string]any{"type": "string"},
+				},
+				"required": []string{"card_id", "body"},
+			}),
+		},
+		{
+			Name:        "list_comments",
+			Description: "Lista los comentarios (card_messages) de una tarjeta en orden cronologico.",
+			InputSchema: rawSchema(map[string]any{
+				"type": "object",
+				"properties": map[string]any{
+					"card_id": map[string]any{"type": "string"},
+				},
+				"required": []string{"card_id"},
+			}),
+		},
 	}
 }