diff --git a/lua/avante/llm_tools/bash.lua b/lua/avante/llm_tools/bash.lua
index b3101e3..b532dcf 100644
--- a/lua/avante/llm_tools/bash.lua
+++ b/lua/avante/llm_tools/bash.lua
@@ -2,14 +2,21 @@ local Path = require("plenary.path")
 local Utils = require("avante.utils")
 local Helpers = require("avante.llm_tools.helpers")
 local Base = require("avante.llm_tools.base")
+local Config = require("avante.config")
+local Providers = require("avante.providers")
 
 ---@class AvanteLLMTool
 local M = setmetatable({}, Base)
 
 M.name = "bash"
 
-M.description =
-  [[Executes a given bash command in a persistent shell session with optional timeout, ensuring proper handling and security measures.
+M.get_description = function()
+  local provider = Providers[Config.provider]
+  if Config.provider:match("copilot") and provider.model and provider.model:match("gpt") then
+    return [[Executes a given bash command in a persistent shell session with optional timeout, ensuring proper handling and security measures.]]
+  end
+
+  return [[Executes a given bash command in a persistent shell session with optional timeout, ensuring proper handling and security measures.
 
 Before executing the command, please follow these steps:
 
@@ -154,6 +161,7 @@ EOF
 Important:
 - Return an empty response - the user will see the gh output directly
 - Never update git config]]
+end
 
 ---@type AvanteLLMToolParam
 M.param = {
diff --git a/lua/avante/providers/claude.lua b/lua/avante/providers/claude.lua
index d591aca..7830d57 100644
--- a/lua/avante/providers/claude.lua
+++ b/lua/avante/providers/claude.lua
@@ -37,7 +37,7 @@ function M:transform_tool(tool)
   local input_schema_properties, required = Utils.llm_tool_param_fields_to_json_schema(tool.param.fields)
   return {
     name = tool.name,
-    description = tool.description,
+    description = tool.get_description and tool.get_description() or tool.description,
     input_schema = {
       type = "object",
       properties = input_schema_properties,
diff --git a/lua/avante/providers/openai.lua b/lua/avante/providers/openai.lua
index a66b641..9b9bbd5 100644
--- a/lua/avante/providers/openai.lua
+++ b/lua/avante/providers/openai.lua
@@ -34,7 +34,7 @@ function M:transform_tool(tool)
     type = "function",
     ["function"] = {
       name = tool.name,
-      description = tool.description,
+      description = tool.get_description and tool.get_description() or tool.description,
       parameters = parameters,
     },
   }
diff --git a/lua/avante/types.lua b/lua/avante/types.lua
index 0cec64b..e6eed1a 100644
--- a/lua/avante/types.lua
+++ b/lua/avante/types.lua
@@ -345,7 +345,8 @@ vim.g.avante_login = vim.g.avante_login
 ---
 ---@class AvanteLLMTool
 ---@field name string
----@field description string
+---@field description? string
+---@field get_description? fun(): string
 ---@field func? AvanteLLMToolFunc
 ---@field param AvanteLLMToolParam
 ---@field returns AvanteLLMToolReturn[]
@@ -360,7 +361,8 @@ vim.g.avante_login = vim.g.avante_login
 
 ---@class AvanteLLMToolParamField
 ---@field name string
----@field description string
+---@field description? string
+---@field get_description? fun(): string
 ---@field type 'string' | 'integer' | 'boolean' | 'object'
 ---@field fields? AvanteLLMToolParamField[]
 ---@field optional? boolean
diff --git a/lua/avante/utils/init.lua b/lua/avante/utils/init.lua
index 4be1c83..015a96d 100644
--- a/lua/avante/utils/init.lua
+++ b/lua/avante/utils/init.lua
@@ -1208,14 +1208,14 @@ function M.llm_tool_param_fields_to_json_schema(fields)
       local properties_, required_ = M.llm_tool_param_fields_to_json_schema(field.fields)
       properties[field.name] = {
         type = field.type,
-        description = field.description,
+        description = field.get_description and field.get_description() or field.description,
         properties = properties_,
         required = required_,
       }
     else
       properties[field.name] = {
         type = field.type,
-        description = field.description,
+        description = field.get_description and field.get_description() or field.description,
       }
     end
     if not field.optional then table.insert(required, field.name) end