diff --git a/Assignments-overview.md b/Assignments-overview.md
index 2ab355a..4c3d3e1 100644
--- a/Assignments-overview.md
+++ b/Assignments-overview.md
@@ -70,36 +70,37 @@ tasks:
 	  source: "94549d889ae96210ff2a73bd0a5bbe3185f05ff6"
 	  destination: "recodex.cpp"
 	  cmd: "fetch"
-	  log: "fetch.log"
+	  log: "fetch.log"  # voluntary option, can be omitted
 	- task-id: "fetch_input"
 	  priority: 2
 	  fatal-failure: true
 	  source: "94549d889ae96210ff2a73bd0a5bbe3185f05ff6"
 	  destination: "01.in"
 	  cmd: "fetch"
-	  log: "fetch.log"
+	  log: "fetch.log"  # voluntary option, can be omitted
 	- task-id: "move_test01"
 	  priority: 3
 	  fatal-failure: true
-	  dependencies:
+	  dependencies:  # can be omitted if there is no dependencies
 		- compile_test01
 	  source: "recodex.cpp"
 	  destination: "/codex/boxes/tmp/recodex.cpp"
 	  cmd: "mv"
-	  log: "move.log"
+	  log: "move.log"  # voluntary option, can be omitted
 	- task-id: "eval_test01"
 	  priority: 4
 	  fatal-failure: false
 	  dependencies:
 		- move_test01
 	  cmd: "recodex -v -f 01.in"
-	  stdin: "01.in"
-	  stdout: "01.out"
-	  stderr: "01.err"
-	  log: "eval.log"
+	  stdin: "01.in"  # can be omitted if there is no binding to stdin
+	  stdout: "01.out"  # can be omitted if there is no binding to stdout
+	  stderr: "01.err"  # can be omitted if there is no binding to stderr
+	  log: "eval.log"  # voluntary option, can be omitted
 	  sandbox:  # if defined task is external and will be run in sandbox
-		name: "isolate"
-		limits:
+		name: "isolate"  # mandatory information
+		limits:  # if not defined, then worker default configuration of limits is loaded
+			 # anything of the specified limits can be omitted and will be loaded from worker defaults
 			- hw-group-id: group1  # determines specific limits for specific machines
 			  time: 5  # seconds
 			  wall-time: 6  # seconds
@@ -108,7 +109,7 @@ tasks:
 			  memory: 50000  # in KB
 			  parallel: false  # time and memory limits are merged from all potential processes/threads
 			  disk-usage: 5  # MB
-			  directory-bindings:
+			  directory-bindings:  # describes which folders will be visible inside sandbox
 				- "/tmp/prepared": "/box"
 				- "/tmp/skeleton": "/"
 			  environ-variable:
@@ -121,7 +122,7 @@ tasks:
 			  memory: 60000  # in KB
 			  parallel: false  # time and memory limits are merged from all potential processes/threads
 			  disk-usage: 50  # MB
-			  directory-bindings:
+			  directory-bindings:  # describes which folders will be visible inside sandbox
 				- "/tmp/prepared_home": "/home/"
 ...
 ```