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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Bug: SK runs his self-made function by ignoring the auto-invoke function config","articleBody":"**Describe the bug**\nI set the toolcallbehavior of `allowOnlyKernelFunctions` as `true`, and passed the functions to the kernel\nbut the kernel make a functiontoolcall by himself and just invoke it.\n\n**To Reproduce**\nSteps to reproduce the behavior:\n```java\n         List\u003cKernelFunction\u003c?\u003e\u003e functions = kernel.getPlugins().stream()\n                .map(KernelPlugin::getFunctions)\n                .map(Map::values)\n                .flatMap(Collection::stream)\n                .toList();\n        FunctionResult\u003cString\u003e preResult = kernel\n                .invokeAsync(function)\n                .withToolCallBehavior(ToolCallBehavior.allowOnlyKernelFunctions(true, functions))\n                .withArguments(\n                        KernelFunctionArguments.builder()\n                                .withInput(userInput)\n                                .withVariable(\"metadata\", metadata)\n                                .build())\n                .withResultType(ContextVariableTypes.getGlobalVariableTypeForClass(String.class))\n                .block();    // occur exception here, for invoke a self-make function\n``` \n\n**Expected behavior**\nOnly invoke the passed functions.\n\n**Screenshots**\n\u003cimg width=\"1183\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/45438851-1178-403d-82e2-3848783dc0c8\" /\u003e\n\n**Maven**\n - Version: 3.3.9\n - Dependencies: 1.4.3\n\n**Platform**\n - IDE: IDEA\n - JDK version: 17\n\n**Additional context**\nExcption:  com.azure.core.exception.HttpResponseException: Status code 400, \"{\"error\":{\"message\":\"Invalid 'messages[1].tool_calls[1].function.name': string does not match pattern. Expected a string that matches the pattern '^[a-zA-Z0-9_-]+$'.\",\"type\":\"invalid_request_error\",\"code\":\"invalid_value\",\"param\":\"messages[1].tool_calls[1].function.name\"}}\"\n","author":{"url":"https://github.com/zzzhy","@type":"Person","name":"zzzhy"},"datePublished":"2025-01-02T12:29:23.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/281/semantic-kernel-java/issues/281"}