diff --git a/backend/open_webui/utils/middleware.py b/backend/open_webui/utils/middleware.py
index 083f478cef..0b67c6deed 100644
--- a/backend/open_webui/utils/middleware.py
+++ b/backend/open_webui/utils/middleware.py
@@ -2,6 +2,7 @@ import ast
 import asyncio
 import base64
 import copy
+import hashlib
 import html
 import inspect
 import json
@@ -2970,10 +2971,15 @@ async def process_chat_payload(request, form_data, user, metadata, model):
 
                             tool_function = await make_tool_function(client, tool_spec['name'])
 
-                            mcp_tools_dict[f'{server_id}_{tool_spec["name"]}'] = {
+                            tool_name = f'{server_id}_{tool_spec["name"]}'
+                            # Providers reject tool names over 64 characters
+                            if len(tool_name) > 64:
+                                tool_name = f'{tool_name[:55]}_{hashlib.sha256(tool_name.encode()).hexdigest()[:8]}'
+
+                            mcp_tools_dict[tool_name] = {
                                 'spec': {
                                     **tool_spec,
-                                    'name': f'{server_id}_{tool_spec["name"]}',
+                                    'name': tool_name,
                                 },
                                 'callable': tool_function,
                                 'type': 'mcp',