diff --git a/codex-rs/tui/src/app/app_server_events.rs b/codex-rs/tui/src/app/app_server_events.rs
index eb9933b89c..c4faba0050 100644
--- a/codex-rs/tui/src/app/app_server_events.rs
+++ b/codex-rs/tui/src/app/app_server_events.rs
@@ -10,6 +10,8 @@ use crate::app_event::ConnectorsSnapshot;
 use crate::app_info::app_info_from_api;
 use crate::app_server_session::AppServerSession;
 use crate::app_server_session::status_account_display_from_auth_mode;
+use crate::terminal_browser::TERMINAL_BROWSER_NAMESPACE;
+use crate::terminal_browser::dynamic_tool_response;
 use codex_app_server_client::AppServerEvent;
 use codex_app_server_protocol::AuthMode;
 use codex_app_server_protocol::ServerNotification;
@@ -232,6 +234,53 @@ impl App {
             return;
         }
 
+        if let ServerRequest::DynamicToolCall { request_id, params } = &request
+            && params.namespace.as_deref() == Some(TERMINAL_BROWSER_NAMESPACE)
+        {
+            if !self.terminal_browser_request_matches_active_thread(&params.thread_id) {
+                self.app_event_tx
+                    .send(AppEvent::TerminalBrowserToolCompleted {
+                        request_id: request_id.clone(),
+                        response: dynamic_tool_response(Err(anyhow::anyhow!(
+                            "terminal browser permission policy only allows the active TUI thread"
+                        ))),
+                        profile_approval: None,
+                    });
+                return;
+            }
+            let Some(browser) = self.terminal_browser_for_active_request().await else {
+                self.app_event_tx
+                    .send(AppEvent::TerminalBrowserToolCompleted {
+                        request_id: request_id.clone(),
+                        response: dynamic_tool_response(Err(anyhow::anyhow!(
+                            "terminal browser permission policy disables this TUI session"
+                        ))),
+                        profile_approval: None,
+                    });
+                return;
+            };
+            let request_id = request_id.clone();
+            let session_key = params.thread_id.clone();
+            let tool = params.tool.clone();
+            let arguments = params.arguments.clone();
+            let profile_approval = (tool == "profile")
+                .then(|| crate::terminal_browser::requested_profile_command(&arguments))
+                .flatten()
+                .and_then(|command| self.terminal_browser_profile_approval(command));
+            let app_event_tx = self.app_event_tx.clone();
+            tokio::spawn(async move {
+                let result = browser.execute(&session_key, &tool, arguments).await;
+                let profile_approval = result.is_ok().then_some(profile_approval).flatten();
+                let response = dynamic_tool_response(result);
+                app_event_tx.send(AppEvent::TerminalBrowserToolCompleted {
+                    request_id,
+                    response,
+                    profile_approval,
+                });
+            });
+            return;
+        }
+
         if let Some(unsupported) = self
             .pending_app_server_requests
             .note_server_request(&request)
diff --git a/codex-rs/tui/src/app_server_session.rs b/codex-rs/tui/src/app_server_session.rs
index 1cc2452965..8a83d2bee4 100644
--- a/codex-rs/tui/src/app_server_session.rs
+++ b/codex-rs/tui/src/app_server_session.rs
@@ -13,6 +13,7 @@ use crate::session_state::MessageHistoryMetadata;
 use crate::session_state::ThreadSessionState;
 use crate::status::StatusAccountDisplay;
 use crate::status::plan_type_display_name;
+use crate::terminal_browser::dynamic_tool_specs;
 use crate::terminal_visualization_instructions::with_terminal_visualization_instructions;
 use codex_app_server_client::AppServerClient;
 use codex_app_server_client::AppServerEvent;
@@ -110,6 +111,7 @@ use codex_app_server_protocol::TurnStartResponse;
 use codex_app_server_protocol::TurnSteerParams;
 use codex_app_server_protocol::TurnSteerResponse;
 use codex_app_server_protocol::UserInput;
+use codex_features::Feature;
 use codex_otel::TelemetryAuthMode;
 use codex_protocol::ThreadId;
 use codex_protocol::approvals::GuardianAssessmentEvent;
@@ -1405,6 +1407,12 @@ fn thread_start_params_from_config(
     remote_cwd_override: Option<&std::path::Path>,
     session_start_source: Option<ThreadStartSource>,
 ) -> ThreadStartParams {
+    let dynamic_tools = (matches!(thread_params_mode, ThreadParamsMode::Embedded)
+        && cfg!(any(target_os = "macos", target_os = "linux"))
+        && config.features.enabled(Feature::TerminalBrowser)
+        && config.permissions.network_sandbox_policy().is_enabled()
+        && config.permissions.network.is_none())
+    .then(dynamic_tool_specs);
     let permissions = permissions_selection_from_config(config, thread_params_mode);
     let sandbox = permissions
         .is_none()
@@ -1432,6 +1440,7 @@ fn thread_start_params_from_config(
         developer_instructions: with_terminal_visualization_instructions(
             config, /*control_instructions*/ None,
         ),
+        dynamic_tools,
         ..ThreadStartParams::default()
     }
 }
@@ -1803,6 +1812,37 @@ mod tests {
             .expect("config should build")
     }
 
+    #[cfg(any(target_os = "macos", target_os = "linux"))]
+    async fn build_terminal_browser_config(managed_network: bool) -> Config {
+        let codex_home = tempfile::tempdir().expect("terminal-browser config home");
+        let mut cli_overrides = vec![(
+            "features.terminal_browser".to_string(),
+            toml::Value::Boolean(true),
+        )];
+        if managed_network {
+            cli_overrides.push((
+                "features.network_proxy".to_string(),
+                toml::Value::Boolean(true),
+            ));
+        }
+        ConfigBuilder::default()
+            .codex_home(codex_home.path().to_path_buf())
+            .loader_overrides(codex_config::LoaderOverrides::without_managed_config_for_tests())
+            .cli_overrides(cli_overrides)
+            .harness_overrides(ConfigOverrides {
+                permission_profile: Some(PermissionProfile::workspace_write_with(
+                    &[],
+                    NetworkSandboxPolicy::Enabled,
+                    /*exclude_tmpdir_env_var*/ false,
+                    /*exclude_slash_tmp*/ false,
+                )),
+                ..ConfigOverrides::default()
+            })
+            .build()
+            .await
+            .expect("terminal-browser config should build")
+    }
+
     fn rate_limit_snapshot(limit_id: &str) -> RateLimitSnapshot {
         RateLimitSnapshot {
             limit_id: Some(limit_id.to_string()),
@@ -1910,6 +1950,73 @@ mod tests {
         assert_eq!(params.thread_source, Some(ThreadSource::User));
     }
 
+    #[cfg(any(target_os = "macos", target_os = "linux"))]
+    #[tokio::test]
+    async fn terminal_browser_dynamic_tools_require_supported_embedded_network_mode() {
+        let direct_config = build_terminal_browser_config(/*managed_network*/ false).await;
+        let managed_config = build_terminal_browser_config(/*managed_network*/ true).await;
+        assert_eq!(
+            direct_config.permissions.network_sandbox_policy(),
+            NetworkSandboxPolicy::Enabled
+        );
+        assert!(direct_config.permissions.network.is_none());
+        assert!(managed_config.permissions.network.is_some());
+
+        let mut feature_disabled_config = direct_config.clone();
+        feature_disabled_config
+            .features
+            .disable(Feature::TerminalBrowser)
+            .expect("terminal-browser feature should be mutable in tests");
+        let mut restricted_config = direct_config.clone();
+        restricted_config
+            .permissions
+            .set_permission_profile(PermissionProfile::read_only())
+            .expect("read-only permission profile should be allowed in tests");
+        assert_eq!(
+            restricted_config.permissions.network_sandbox_policy(),
+            NetworkSandboxPolicy::Restricted
+        );
+
+        let cases = [
+            (
+                "embedded direct",
+                &direct_config,
+                ThreadParamsMode::Embedded,
+                true,
+            ),
+            (
+                "remote direct",
+                &direct_config,
+                ThreadParamsMode::Remote,
+                false,
+            ),
+            (
+                "feature disabled",
+                &feature_disabled_config,
+                ThreadParamsMode::Embedded,
+                false,
+            ),
+            (
+                "network restricted",
+                &restricted_config,
+                ThreadParamsMode::Embedded,
+                false,
+            ),
+            (
+                "managed network",
+                &managed_config,
+                ThreadParamsMode::Embedded,
+                false,
+            ),
+        ];
+        for (name, config, mode, expected) in cases {
+            let params = thread_start_params_from_config(
+                config, mode, /*remote_cwd_override*/ None, /*session_start_source*/ None,
+            );
+            assert_eq!(params.dynamic_tools.is_some(), expected, "{name}");
+        }
+    }
+
     #[tokio::test]
     async fn thread_start_params_can_mark_clear_source() {
         let temp_dir = tempfile::tempdir().expect("tempdir");