diff --git a/codex-rs/analytics/src/analytics_client_tests.rs b/codex-rs/analytics/src/analytics_client_tests.rs
index eb511483a4..39b5e0fa88 100644
--- a/codex-rs/analytics/src/analytics_client_tests.rs
+++ b/codex-rs/analytics/src/analytics_client_tests.rs
@@ -6,9 +6,14 @@ use crate::events::CodexAppUsedEventRequest;
 use crate::events::CodexPluginEventRequest;
 use crate::events::CodexPluginUsedEventRequest;
 use crate::events::CodexRuntimeMetadata;
+use crate::events::CodexToolCallEventParams;
+use crate::events::CodexToolCallEventRequest;
 use crate::events::ThreadInitializationMode;
 use crate::events::ThreadInitializedEvent;
 use crate::events::ThreadInitializedEventParams;
+use crate::events::ToolCallFinalReviewOutcome;
+use crate::events::ToolCallTerminalStatus;
+use crate::events::ToolKind;
 use crate::events::TrackEventRequest;
 use crate::events::codex_app_metadata;
 use crate::events::codex_plugin_metadata;
@@ -346,6 +351,89 @@ fn thread_initialized_event_serializes_expected_shape() {
     );
 }
 
+#[test]
+fn tool_call_event_serializes_expected_shape() {
+    let event = TrackEventRequest::ToolCall(CodexToolCallEventRequest {
+        event_type: "codex_tool_call_event",
+        event_params: CodexToolCallEventParams {
+            thread_id: "thread-1".to_string(),
+            turn_id: "turn-1".to_string(),
+            tool_call_id: "tool-call-1".to_string(),
+            app_server_client: CodexAppServerClientMetadata {
+                product_client_id: "codex_tui".to_string(),
+                client_name: Some("codex-tui".to_string()),
+                client_version: Some("1.2.3".to_string()),
+                rpc_transport: AppServerRpcTransport::Websocket,
+                experimental_api_enabled: Some(true),
+            },
+            runtime: CodexRuntimeMetadata {
+                codex_rs_version: "0.99.0".to_string(),
+                runtime_os: "macos".to_string(),
+                runtime_os_version: "15.3.1".to_string(),
+                runtime_arch: "aarch64".to_string(),
+            },
+            tool_name: "shell".to_string(),
+            tool_kind: ToolKind::Shell,
+            started_at: 123,
+            completed_at: Some(125),
+            duration_ms: Some(2000),
+            execution_started: true,
+            review_count: 0,
+            guardian_review_count: 0,
+            user_review_count: 0,
+            final_review_outcome: ToolCallFinalReviewOutcome::NotNeeded,
+            terminal_status: ToolCallTerminalStatus::Completed,
+            failure_kind: None,
+            exit_code: Some(0),
+            requested_additional_permissions: false,
+            requested_network_access: false,
+            retry_count: 0,
+        },
+    });
+
+    let payload = serde_json::to_value(&event).expect("serialize tool call event");
+    assert_eq!(
+        payload,
+        json!({
+            "event_type": "codex_tool_call_event",
+            "event_params": {
+                "thread_id": "thread-1",
+                "turn_id": "turn-1",
+                "tool_call_id": "tool-call-1",
+                "app_server_client": {
+                    "product_client_id": "codex_tui",
+                    "client_name": "codex-tui",
+                    "client_version": "1.2.3",
+                    "rpc_transport": "websocket",
+                    "experimental_api_enabled": true
+                },
+                "runtime": {
+                    "codex_rs_version": "0.99.0",
+                    "runtime_os": "macos",
+                    "runtime_os_version": "15.3.1",
+                    "runtime_arch": "aarch64"
+                },
+                "tool_name": "shell",
+                "tool_kind": "shell",
+                "started_at": 123,
+                "completed_at": 125,
+                "duration_ms": 2000,
+                "execution_started": true,
+                "review_count": 0,
+                "guardian_review_count": 0,
+                "user_review_count": 0,
+                "final_review_outcome": "not_needed",
+                "terminal_status": "completed",
+                "failure_kind": null,
+                "exit_code": 0,
+                "requested_additional_permissions": false,
+                "requested_network_access": false,
+                "retry_count": 0
+            }
+        })
+    );
+}
+
 #[tokio::test]
 async fn initialize_caches_client_and_thread_lifecycle_publishes_once_initialized() {
     let mut reducer = AnalyticsReducer::default();
diff --git a/codex-rs/analytics/src/events.rs b/codex-rs/analytics/src/events.rs
index 885e93bbb9..f82ebe6f0a 100644
--- a/codex-rs/analytics/src/events.rs
+++ b/codex-rs/analytics/src/events.rs
@@ -37,6 +37,7 @@ pub(crate) enum TrackEventRequest {
     ThreadInitialized(ThreadInitializedEvent),
     AppMentioned(CodexAppMentionedEventRequest),
     AppUsed(CodexAppUsedEventRequest),
+    ToolCall(CodexToolCallEventRequest),
     PluginUsed(CodexPluginUsedEventRequest),
     PluginInstalled(CodexPluginEventRequest),
     PluginUninstalled(CodexPluginEventRequest),
@@ -99,6 +100,81 @@ pub(crate) struct ThreadInitializedEvent {
     pub(crate) event_params: ThreadInitializedEventParams,
 }
 
+#[derive(Clone, Copy, Debug, Serialize)]
+#[serde(rename_all = "snake_case")]
+pub(crate) enum ToolKind {
+    Shell,
+    UnifiedExec,
+    ApplyPatch,
+    Mcp,
+    Dynamic,
+    Other,
+}
+
+#[derive(Clone, Copy, Debug, Serialize)]
+#[serde(rename_all = "snake_case")]
+pub(crate) enum ToolCallFinalReviewOutcome {
+    NotNeeded,
+    GuardianApproved,
+    GuardianDenied,
+    GuardianAborted,
+    UserApproved,
+    UserApprovedForSession,
+    UserDenied,
+    UserAborted,
+    ConfigAllowed,
+}
+
+#[derive(Clone, Copy, Debug, Serialize)]
+#[serde(rename_all = "snake_case")]
+pub(crate) enum ToolCallTerminalStatus {
+    Completed,
+    Failed,
+    Rejected,
+    Interrupted,
+}
+
+#[derive(Clone, Copy, Debug, Serialize)]
+#[serde(rename_all = "snake_case")]
+pub(crate) enum ToolCallFailureKind {
+    ToolError,
+    ApprovalDenied,
+    ApprovalAborted,
+    SandboxDenied,
+    PolicyForbidden,
+}
+
+#[derive(Serialize)]
+pub(crate) struct CodexToolCallEventParams {
+    pub(crate) thread_id: String,
+    pub(crate) turn_id: String,
+    pub(crate) tool_call_id: String,
+    pub(crate) app_server_client: CodexAppServerClientMetadata,
+    pub(crate) runtime: CodexRuntimeMetadata,
+    pub(crate) tool_name: String,
+    pub(crate) tool_kind: ToolKind,
+    pub(crate) started_at: u64,
+    pub(crate) completed_at: Option<u64>,
+    pub(crate) duration_ms: Option<u64>,
+    pub(crate) execution_started: bool,
+    pub(crate) review_count: u64,
+    pub(crate) guardian_review_count: u64,
+    pub(crate) user_review_count: u64,
+    pub(crate) final_review_outcome: ToolCallFinalReviewOutcome,
+    pub(crate) terminal_status: ToolCallTerminalStatus,
+    pub(crate) failure_kind: Option<ToolCallFailureKind>,
+    pub(crate) exit_code: Option<i32>,
+    pub(crate) requested_additional_permissions: bool,
+    pub(crate) requested_network_access: bool,
+    pub(crate) retry_count: u64,
+}
+
+#[derive(Serialize)]
+pub(crate) struct CodexToolCallEventRequest {
+    pub(crate) event_type: &'static str,
+    pub(crate) event_params: CodexToolCallEventParams,
+}
+
 #[derive(Serialize)]
 pub(crate) struct CodexAppMetadata {
     pub(crate) connector_id: Option<String>,