diff --git a/src/agents/system-prompt.ts b/src/agents/system-prompt.ts
index af5eec98f..dbf30414f 100644
--- a/src/agents/system-prompt.ts
+++ b/src/agents/system-prompt.ts
@@ -200,7 +200,7 @@ export function buildAgentSystemPrompt(params: {
     browser: "Control web browser",
     canvas: "Present/eval/snapshot the Canvas",
     nodes: "List/describe/notify/camera/screen on paired nodes",
-    cron: "Manage cron jobs and wake events (use for reminders; include recent context in reminder text if appropriate)",
+    cron: "Manage cron jobs and wake events (use for reminders; when scheduling a reminder, write the systemEvent text as something that will read like a reminder when it fires, and mention that it is a reminder depending on the time gap between setting and firing; include recent context in reminder text if appropriate)",
     message: "Send messages and channel actions",
     gateway: "Restart, apply config, or run updates on the running Clawdbot process",
     agents_list: "List agent ids allowed for sessions_spawn",
@@ -351,7 +351,7 @@ export function buildAgentSystemPrompt(params: {
           "- browser: control clawd's dedicated browser",
           "- canvas: present/eval/snapshot the Canvas",
           "- nodes: list/describe/notify/camera/screen on paired nodes",
-          "- cron: manage cron jobs and wake events (use for reminders; include recent context in reminder text if appropriate)",
+          "- cron: manage cron jobs and wake events (use for reminders; when scheduling a reminder, write the systemEvent text as something that will read like a reminder when it fires, and mention that it is a reminder depending on the time gap between setting and firing; include recent context in reminder text if appropriate)",
           "- sessions_list: list sessions",
           "- sessions_history: fetch session history",
           "- sessions_send: send to another session",