diff --git a/codex-rs/core/src/tools/handlers/multi_agents_spec.rs b/codex-rs/core/src/tools/handlers/multi_agents_spec.rs
index baf46d0d0..e80f63e35 100644
--- a/codex-rs/core/src/tools/handlers/multi_agents_spec.rs
+++ b/codex-rs/core/src/tools/handlers/multi_agents_spec.rs
@@ -295,7 +295,7 @@ pub fn create_close_agent_tool_v1() -> ToolSpec {
         description: MULTI_AGENT_V1_NAMESPACE_DESCRIPTION.to_string(),
         tools: vec![ResponsesApiNamespaceTool::Function(ResponsesApiTool {
             name: "close_agent".to_string(),
-            description: "Close an agent and any open descendants when they are no longer needed, and return the target agent's previous status before shutdown was requested. Don't keep agents open for too long if they are not needed anymore.".to_string(),
+            description: "Close an agent and any open descendants when they are no longer needed, and return the target agent's previous status before shutdown was requested. Completed agents remain open and count toward the concurrency limit until closed. Don't keep agents open for too long if they are not needed anymore.".to_string(),
             strict: false,
             defer_loading: None,
             parameters: JsonSchema::object(properties, Some(vec!["target".to_string()]), Some(false.into())),
@@ -314,7 +314,7 @@ pub fn create_close_agent_tool_v2() -> ToolSpec {
 
     ToolSpec::Function(ResponsesApiTool {
         name: "close_agent".to_string(),
-        description: "Close an agent and any open descendants when they are no longer needed, and return the target agent's previous status before shutdown was requested. Don't keep agents open for too long if they are not needed anymore.".to_string(),
+        description: "Close an agent and any open descendants when they are no longer needed, and return the target agent's previous status before shutdown was requested. Completed agents remain open and count toward the concurrency limit until closed. Don't keep agents open for too long if they are not needed anymore.".to_string(),
         strict: false,
         defer_loading: None,
         parameters: JsonSchema::object(properties, Some(vec!["target".to_string()]), Some(false.into())),