diff --git a/nexus/workflow-service.wit b/nexus/workflow-service.wit
index 190aae88c..9714e40cf 100644
--- a/nexus/workflow-service.wit
+++ b/nexus/workflow-service.wit
@@ -37,9 +37,10 @@ interface workflow-service {
     ///   python="Workflow type name or callable identifying the workflow to start."
     ///   typescript="Workflow type name or workflow function identifying the workflow to start."
     ///   dotnet="Workflow type name or workflow expression identifying the workflow to start."
+    ///   go="Workflow function identifying the workflow to start."
     /// @nexus.proto-field "workflow_type"
     workflow: workflow-function,
-    /// @nexus.doc "Unique identifier for the workflow execution."
+    /// @nexus.doc "Unique identifier for the workflow execution. Must be nonempty."
     /// @nexus.proto-field "workflow_id"
     id: string,
     /// @nexus.doc "Task queue to run the workflow on."
@@ -50,14 +51,17 @@ interface workflow-service {
     ///   dotnet="Signal name or signal expression to send with the start request."
     /// @nexus.proto-field "signal_name"
     signal: signal-function,
-    /// @nexus.doc "Total workflow execution timeout, including retries and continue-as-new."
+    /// @nexus.doc "Total workflow execution timeout, including retries and continue-as-new. Defaults to unlimited."
     /// @nexus.proto-field "workflow_execution_timeout"
+    /// @nexus.name go="WorkflowExecutionTimeout"
     execution-timeout: option<duration>,
-    /// @nexus.doc "Timeout of a single workflow run."
+    /// @nexus.doc "Timeout of a single workflow run. Defaults to the workflow execution timeout."
     /// @nexus.proto-field "workflow_run_timeout"
+    /// @nexus.name go="WorkflowRunTimeout"
     run-timeout: option<duration>,
-    /// @nexus.doc "Timeout of a single workflow task."
+    /// @nexus.doc "Timeout of a single workflow task. Defaults to 10 seconds."
     /// @nexus.proto-field "workflow_task_timeout"
+    /// @nexus.name go="WorkflowTaskTimeout"
     task-timeout: option<duration>,
     /// @nexus.omit
     identity: placeholder,
@@ -67,7 +71,7 @@ interface workflow-service {
     /// @nexus.proto-field "workflow_id_reuse_policy"
     /// @nexus.default "allow-duplicate"
     id-reuse-policy: workflow-id-reuse-policy,
-    /// @nexus.doc "Behavior when a workflow is currently running with the same ID. Set to use-existing for idempotent deduplication on workflow ID. Cannot be set if id-reuse-policy is terminate-if-running."
+    /// @nexus.doc "Behavior when a workflow is currently running with the same ID. Set to use-existing for idempotent deduplication on workflow ID. Cannot be set if id-reuse-policy is terminate-if-running. Defaults to use-existing."
     /// @nexus.proto-field "workflow_id_conflict_policy"
     id-conflict-policy: option<workflow-id-conflict-policy>,
     /// @nexus.doc "Retry policy for the workflow."