diff --git a/src/cron/tool/CronSchemas.ts b/src/cron/tool/CronSchemas.ts
index 752f9f822..7450d9d02 100644
--- a/src/cron/tool/CronSchemas.ts
+++ b/src/cron/tool/CronSchemas.ts
@@ -5,7 +5,8 @@ export const CRON_SCHEDULE_SCHEMA = {
       required: ["type", "runAt"],
       additionalProperties: false,
       properties: {
-        type: { const: "once" },
+        // Moonshot/Kimi requires an explicit type alongside const/enum.
+        type: { type: "string", const: "once" },
         runAt: { type: "string" },
       },
     },
@@ -14,7 +15,7 @@ export const CRON_SCHEDULE_SCHEMA = {
       required: ["type", "expression"],
       additionalProperties: false,
       properties: {
-        type: { const: "cron" },
+        type: { type: "string", const: "cron" },
         expression: { type: "string" },
         timezone: { type: "string" },
       },
@@ -24,9 +25,9 @@ export const CRON_SCHEDULE_SCHEMA = {
       required: ["type", "amount", "unit"],
       additionalProperties: false,
       properties: {
-        type: { const: "delay" },
+        type: { type: "string", const: "delay" },
         amount: { type: "number", exclusiveMinimum: 0 },
-        unit: { enum: ["second", "minute", "hour", "day"] },
+        unit: { type: "string", enum: ["second", "minute", "hour", "day"] },
       },
     },
   ],