diff --git a/server/src/nest/todo/todo.mcp.ts b/server/src/nest/todo/todo.mcp.ts
index 278cd8ebe..6b01ef985 100644
--- a/server/src/nest/todo/todo.mcp.ts
+++ b/server/src/nest/todo/todo.mcp.ts
@@ -65,7 +65,7 @@ export class TodoMcp {
       due_date: z.string().regex(/^\d{4}-\d{2}-\d{2}$/).optional().describe('Due date (YYYY-MM-DD)'),
       description: z.string().max(2000).optional().describe('Additional description'),
       assigned_user_id: z.number().int().positive().optional().describe('User ID to assign this task to'),
-      priority: z.number().int().min(0).max(3).optional().describe('Priority: 0=none, 1=low, 2=medium, 3=high'),
+      priority: z.number().int().min(0).max(3).optional().describe('Priority: 0=none, 1=P1 (highest), 2=P2, 3=P3 (lowest)'),
     },
     annotations: TOOL_ANNOTATIONS_NON_IDEMPOTENT,
     when: packingAddonOn,
@@ -96,7 +96,7 @@ export class TodoMcp {
       due_date: z.string().regex(/^\d{4}-\d{2}-\d{2}$/).nullable().optional().describe('Set to null to clear the due date'),
       description: z.string().max(2000).nullable().optional().describe('Set to null to clear'),
       assigned_user_id: z.number().int().positive().nullable().optional().describe('Set to null to unassign'),
-      priority: z.number().int().min(0).max(3).nullable().optional(),
+      priority: z.number().int().min(0).max(3).nullable().optional().describe('Priority: 0=none, 1=P1 (highest), 2=P2, 3=P3 (lowest); null clears it'),
     },
     annotations: TOOL_ANNOTATIONS_WRITE,
     when: packingAddonOn,