fix(google): scrub tool schemas for gemini

src/agents/pi-embedded-runner/google.test.ts

@@ -0,0 +1,37 @@
+import { describe, expect, it } from "vitest";
+
+import type { AgentTool } from "@mariozechner/pi-agent-core";
+import { sanitizeToolsForGoogle } from "./google.js";
+
+describe("sanitizeToolsForGoogle", () => {
+  it("strips unsupported schema keywords for Google providers", () => {
+    const tool = {
+      name: "test",
+      description: "test",
+      parameters: {
+        type: "object",
+        additionalProperties: false,
+        properties: {
+          foo: {
+            type: "string",
+            format: "uuid",
+          },
+        },
+      },
+      execute: async () => ({ ok: true, content: [] }),
+    } as unknown as AgentTool;
+
+    const [sanitized] = sanitizeToolsForGoogle({
+      tools: [tool],
+      provider: "google-gemini-cli",
+    });
+
+    const params = sanitized.parameters as {
+      additionalProperties?: unknown;
+      properties?: Record<string, { format?: unknown }>;
+    };
+
+    expect(params.additionalProperties).toBeUndefined();
+    expect(params.properties?.foo?.format).toBeUndefined();
+  });
+});