diff --git a/src/features/matches/types.test.ts b/src/features/matches/types.test.ts
new file mode 100644
index 0000000..245f506
--- /dev/null
+++ b/src/features/matches/types.test.ts
@@ -0,0 +1,9 @@
+import { describe, expect, it } from "vitest";
+import { matchInputSchema } from "./types";
+
+describe("matchInputSchema.partial()", () => {
+  it("does not inject keys the caller did not send", () => {
+    const parsed = matchInputSchema.partial().parse({ home_cups: 7 });
+    expect(parsed).toEqual({ home_cups: 7 });
+  });
+});
diff --git a/src/features/matches/types.ts b/src/features/matches/types.ts
index 76bac52..ae31612 100644
--- a/src/features/matches/types.ts
+++ b/src/features/matches/types.ts
@@ -42,20 +42,20 @@ export interface Match {
 export const matchInputSchema = z.object({
   order: z.number().int().min(1).optional(),
   lid: z.number().int().min(1),
-  reset: z.boolean().optional().default(false),
+  reset: z.boolean().optional(),
   round: z.number().int().min(1),
-  home_cups: z.number().int().min(0).optional().default(0),
-  away_cups: z.number().int().min(0).optional().default(0),
-  ot_count: z.number().int().min(0).optional().default(0),
+  home_cups: z.number().int().min(0).optional(),
+  away_cups: z.number().int().min(0).optional(),
+  ot_count: z.number().int().min(0).optional(),
   start_time: z.iso.datetime().optional(),
   end_time: z.iso.datetime().optional(),
-  bye: z.boolean().optional().default(false),
+  bye: z.boolean().optional(),
   home_from_lid: z.number().int().min(1).optional(),
   away_from_lid: z.number().int().min(1).optional(),
-  home_from_loser: z.boolean().optional().default(false),
-  away_from_loser: z.boolean().optional().default(false),
-  is_losers_bracket: z.boolean().optional().default(false),
-  status: z.enum(["tbd", "ready", "started", "ended"]).optional().default("tbd"),
+  home_from_loser: z.boolean().optional(),
+  away_from_loser: z.boolean().optional(),
+  is_losers_bracket: z.boolean().optional(),
+  status: z.enum(["tbd", "ready", "started", "ended"]).optional(),
   tournament: z.string().min(1),
   home: z.string().min(1).nullable().optional(),
   away: z.string().min(1).nullable().optional(),
diff --git a/src/features/tournaments/types.test.ts b/src/features/tournaments/types.test.ts
new file mode 100644
index 0000000..e7f42cd
--- /dev/null
+++ b/src/features/tournaments/types.test.ts
@@ -0,0 +1,15 @@
+import { describe, expect, it } from "vitest";
+import { tournamentInputSchema } from "./types";
+
+describe("tournamentInputSchema.partial()", () => {
+  it("does not inject keys the caller did not send", () => {
+    const parsed = tournamentInputSchema.partial().parse({ rules: "<p>rules</p>" });
+    expect(parsed).toEqual({ rules: "<p>rules</p>" });
+  });
+
+  it("passes an explicit regional flag through unchanged", () => {
+    expect(tournamentInputSchema.partial().parse({ regional: true })).toEqual({
+      regional: true,
+    });
+  });
+});
diff --git a/src/features/tournaments/types.ts b/src/features/tournaments/types.ts
index 435a99b..3fbe025 100644
--- a/src/features/tournaments/types.ts
+++ b/src/features/tournaments/types.ts
@@ -98,7 +98,7 @@ export const tournamentInputSchema = z.object({
   enroll_time: z.string(),
   start_time: z.string(),
   end_time: z.string().optional(),
-  regional: z.boolean().optional().default(false),
+  regional: z.boolean().optional(),
   format: z.enum(["single_elim", "double_elim", "groups", "swiss", "swiss_bracket", "round_robin"]).optional(),
   phase: z.enum(["seeding", "group_stage", "knockout", "completed"]).optional(),
   group_config: z.object({