diff --git a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.discord-group.json b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.discord-group.json
index 2899f00550d..9b9be96e23e 100644
--- a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.discord-group.json
+++ b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.discord-group.json
@@ -1278,6 +1278,10 @@
         "task": {
           "type": "string"
         },
+        "taskName": {
+          "description": "Stable optional alias for later subagents targeting. Use lowercase letters, digits, and underscores, starting with a letter.",
+          "type": "string"
+        },
         "thinking": {
           "type": "string"
         },
@@ -1310,7 +1314,7 @@
   },
   {
     "deferLoading": true,
-    "description": "List, kill, or steer spawned sub-agents for this requester session. Use this for sub-agent orchestration.",
+    "description": "On-demand list, kill, or steer spawned sub-agents for this requester session. If sessions_yield is available, use it to wait for completion events; do not poll this tool in wait loops.",
     "inputSchema": {
       "properties": {
         "action": {
diff --git a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.heartbeat-turn.json b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.heartbeat-turn.json
index 93f51611e9f..c76f4381c76 100644
--- a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.heartbeat-turn.json
+++ b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.heartbeat-turn.json
@@ -1314,6 +1314,10 @@
         "task": {
           "type": "string"
         },
+        "taskName": {
+          "description": "Stable optional alias for later subagents targeting. Use lowercase letters, digits, and underscores, starting with a letter.",
+          "type": "string"
+        },
         "thinking": {
           "type": "string"
         },
@@ -1342,7 +1346,7 @@
   },
   {
     "deferLoading": true,
-    "description": "List, kill, or steer spawned sub-agents for this requester session. Use this for sub-agent orchestration.",
+    "description": "On-demand list, kill, or steer spawned sub-agents for this requester session. If sessions_yield is available, use it to wait for completion events; do not poll this tool in wait loops.",
     "inputSchema": {
       "properties": {
         "action": {
diff --git a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.telegram-direct.json b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.telegram-direct.json
index 57fdc6e93ab..757ec37cfdb 100644
--- a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.telegram-direct.json
+++ b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/codex-dynamic-tools.telegram-direct.json
@@ -1278,6 +1278,10 @@
         "task": {
           "type": "string"
         },
+        "taskName": {
+          "description": "Stable optional alias for later subagents targeting. Use lowercase letters, digits, and underscores, starting with a letter.",
+          "type": "string"
+        },
         "thinking": {
           "type": "string"
         },
@@ -1306,7 +1310,7 @@
   },
   {
     "deferLoading": true,
-    "description": "List, kill, or steer spawned sub-agents for this requester session. Use this for sub-agent orchestration.",
+    "description": "On-demand list, kill, or steer spawned sub-agents for this requester session. If sessions_yield is available, use it to wait for completion events; do not poll this tool in wait loops.",
     "inputSchema": {
       "properties": {
         "action": {
diff --git a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/discord-group-codex-message-tool.md b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/discord-group-codex-message-tool.md
index b2f3e598700..8f6d9e9ea35 100644
--- a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/discord-group-codex-message-tool.md
+++ b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/discord-group-codex-message-tool.md
@@ -213,8 +213,8 @@ This is the deterministic model-bound layer stack OpenClaw can snapshot for the
     "roughTokens": 158
   },
   "dynamicToolsJson": {
-    "chars": 49958,
-    "roughTokens": 12490
+    "chars": 50250,
+    "roughTokens": 12563
   },
   "openClawDeveloperInstructions": {
     "chars": 6023,
@@ -225,8 +225,8 @@ This is the deterministic model-bound layer stack OpenClaw can snapshot for the
     "roughTokens": 7294
   },
   "totalWithDynamicToolsJson": {
-    "chars": 79135,
-    "roughTokens": 19784
+    "chars": 79427,
+    "roughTokens": 19857
   },
   "userInputText": {
     "chars": 870,
diff --git a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/telegram-direct-codex-message-tool.md b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/telegram-direct-codex-message-tool.md
index 8f6c89b625a..bfd7dc37bb2 100644
--- a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/telegram-direct-codex-message-tool.md
+++ b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/telegram-direct-codex-message-tool.md
@@ -213,8 +213,8 @@ This is the deterministic model-bound layer stack OpenClaw can snapshot for the
     "roughTokens": 158
   },
   "dynamicToolsJson": {
-    "chars": 49649,
-    "roughTokens": 12413
+    "chars": 49941,
+    "roughTokens": 12486
   },
   "openClawDeveloperInstructions": {
     "chars": 4999,
@@ -225,8 +225,8 @@ This is the deterministic model-bound layer stack OpenClaw can snapshot for the
     "roughTokens": 6913
   },
   "totalWithDynamicToolsJson": {
-    "chars": 77302,
-    "roughTokens": 19326
+    "chars": 77594,
+    "roughTokens": 19399
   },
   "userInputText": {
     "chars": 370,
diff --git a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/telegram-heartbeat-codex-tool.md b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/telegram-heartbeat-codex-tool.md
index 46ae008f946..b8a80ec72f4 100644
--- a/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/telegram-heartbeat-codex-tool.md
+++ b/test/fixtures/agents/prompt-snapshots/codex-runtime-happy-path/telegram-heartbeat-codex-tool.md
@@ -214,8 +214,8 @@ This is the deterministic model-bound layer stack OpenClaw can snapshot for the
     "roughTokens": 158
   },
   "dynamicToolsJson": {
-    "chars": 50827,
-    "roughTokens": 12707
+    "chars": 51119,
+    "roughTokens": 12780
   },
   "openClawDeveloperInstructions": {
     "chars": 4999,
@@ -226,8 +226,8 @@ This is the deterministic model-bound layer stack OpenClaw can snapshot for the
     "roughTokens": 7782
   },
   "totalWithDynamicToolsJson": {
-    "chars": 81956,
-    "roughTokens": 20489
+    "chars": 82248,
+    "roughTokens": 20562
   },
   "userInputText": {
     "chars": 608,