From cda49c3a9a6d4f002267e66f014466b98fb80cc2 Mon Sep 17 00:00:00 2001
From: Soulter <37870767+Soulter@users.noreply.github.com>
Date: Fri, 20 Feb 2026 16:13:20 +0800
Subject: [PATCH] fix: remove additionalProperties from tool schema properties
 (#5253)

fixes: #5217
---
 astrbot/core/agent/tool.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/astrbot/core/agent/tool.py b/astrbot/core/agent/tool.py
index 04a47b35f..c2536708e 100644
--- a/astrbot/core/agent/tool.py
+++ b/astrbot/core/agent/tool.py
@@ -285,6 +285,9 @@ class ToolSet:
                     prop_value = convert_schema(value)
                     if "default" in prop_value:
                         del prop_value["default"]
+                    # see #5217
+                    if "additionalProperties" in prop_value:
+                        del prop_value["additionalProperties"]
                     properties[key] = prop_value
 
                 if properties: