diff --git a/lua/avante/config.lua b/lua/avante/config.lua
index 7a92f5c..07c7f2c 100644
--- a/lua/avante/config.lua
+++ b/lua/avante/config.lua
@@ -465,7 +465,7 @@ M._defaults = {
     throttle = 600,
   },
   disabled_tools = {}, ---@type string[]
-  ---@type AvanteLLMToolPublic[]
+  ---@type AvanteLLMToolPublic[] | fun(): AvanteLLMToolPublic[]
   custom_tools = {},
 }
 
diff --git a/lua/avante/llm_tools.lua b/lua/avante/llm_tools.lua
index 7d237c5..b14f605 100644
--- a/lua/avante/llm_tools.lua
+++ b/lua/avante/llm_tools.lua
@@ -605,8 +605,10 @@ end
 
 ---@return AvanteLLMTool[]
 function M.get_tools()
+  local custom_tools = Config.custom_tools
+  if type(custom_tools) == "function" then custom_tools = custom_tools() end
   ---@type AvanteLLMTool[]
-  local unfiltered_tools = vim.list_extend(vim.list_extend({}, M._tools), Config.custom_tools)
+  local unfiltered_tools = vim.list_extend(vim.list_extend({}, M._tools), custom_tools)
   return vim
     .iter(unfiltered_tools)
     :filter(function(tool) ---@param tool AvanteLLMTool