Updated Jinja for LM Studio MCP tool calls - tools with no required params or other weirdly defined mcp tools
Does additional check for contents of the tool definition and skips if empty.
{% macro render_item_list(item_list, tag_name='required') %}
{%- if item_list is defined and item_list is iterable and item_list is not string and item_list | length > 0 %}
{%- if tag_name %}{{- '\n<' ~ tag_name ~ '>' -}}{% endif %}
{{- '[' }}
{%- for item in item_list -%}
{%- if loop.index > 1 %}{{- ", "}}{% endif -%}
{%- if item is string -%}
{{ "" ~ item ~ "" }}
{%- else -%}
{{ item }}
{%- endif -%}
{%- endfor -%}
{{- ']' }}
{%- if tag_name %}{{- '</' ~ tag_name ~ '>' -}}{% endif %}
{%- endif %}
{% endmacro %}
{%- if messages[0]["role"] == "system" %}
{%- set system_message = messages[0]["content"] %}
{%- set loop_messages = messages[1:] %}
{%- else %}
{%- set loop_messages = messages %}
{%- endif %}
{%- if not tools is defined %}
{%- set tools = [] %}
{%- endif %}
{%- if system_message is defined %}
{{- "<|im_start|>system\n" + system_message }}
{%- else %}
{%- if tools is iterable and tools | length > 0 %}
{{- "<|im_start|>system\nYou are Qwen, a helpful AI assistant that can interact with a computer to solve tasks." }}
{%- endif %}
{%- endif %}
{%- if tools is iterable and tools | length > 0 %}
{{- "\n\nYou have access to the following functions:\n\n" }}
{{- "" }}
{%- for tool in tools %}
{%- if tool.function is defined %}
{%- set tool = tool.function %}
{%- endif %}
{{- "\n\n" ~ tool.name ~ "" }}
{{- '\n' ~ (tool.description | trim) ~ '' }}
{{- '\n' }}
{%- for param_name, param_fields in tool.parameters.properties|items %}
{{- '\n' }}
{{- '\n' ~ param_name ~ '' }}
{%- if param_fields.type is defined and param_fields.type is not none %}
{{- '\n' ~ (param_fields.type | string) ~ '' }}
{%- endif %}
{%- if param_fields.description is defined and param_fields.description is not none %}
{{- '\n' ~ (param_fields.description | trim) ~ '' }}
{%- endif %}
{{- render_item_list(param_fields.enum, 'enum') }}
{%- set handled_keys = ['type', 'description', 'enum', 'required'] %}
{%- for json_key in param_fields.keys() if json_key not in handled_keys %}
{%- set normed_json_key = json_key | replace("-", "") | replace(" ", "") | replace("$", "") %}
{%- if param_fields[json_key] is mapping %}
{{- '\n<' ~ normed_json_key ~ '>' ~ (param_fields[json_key] | tojson) ~ '</' ~ normed_json_key ~ '>' }}
{%- else %}
{%- if param_fields[json_key] is not none %}
{{- '\n<' ~ normed_json_key ~ '>' ~ (param_fields[json_key] | string) ~ '</' ~ normed_json_key ~ '>' }}
{%- endif %}
{%- endif %}
{%- endfor %}
{{- render_item_list(param_fields.required, 'required') }}
{{- '\n' }}
{%- endfor %}
{{- render_item_list(tool.parameters.required, 'required') }}
{{- '\n' }}
{%- if tool.return is defined and tool.return is not none %}
{%- if tool.return is mapping %}
{{- '\n' ~ (tool.return | tojson) ~ '' }}
{%- else %}
{{- '\n' ~ (tool.return | string) ~ '' }}
{%- endif %}
{%- endif %}
{{- '\n' }}
{%- endfor %}
{{- "\n" }}
{{- '\n\nIf you choose to call a function ONLY reply in the following format with NO suffix:\n\n\n<function=example_function_name>\n<parameter=example_parameter_1>\nvalue_1\n\n<parameter=example_parameter_2>\nThis is the value for the second parameter\nthat can span\nmultiple lines\n\n\n\n\n\nReminder:\n- Function calls MUST follow the specified format: an inner <function=...> block must be nested within XML tags\n- Required parameters MUST be specified\n- You may provide optional reasoning for your function call in natural language BEFORE the function call, but NOT after\n- If there is no function call available, answer the question like normal with your current knowledge and do not tell the user about function calls\n' }}
{%- endif %}
{%- if system_message is defined %}
{{- '<|im_end|>\n' }}
{%- else %}
{%- if tools is iterable and tools | length > 0 %}
{{- '<|im_end|>\n' }}
{%- endif %}
{%- endif %}
{%- for message in loop_messages %}
{%- if message.role == "assistant" and message.tool_calls is defined and message.tool_calls is iterable and message.tool_calls | length > 0 %}
{{- '<|im_start|>' + message.role }}
{%- if message.content is defined and message.content is string and message.content | trim | length > 0 %}
{{- '\n' + message.content | trim + '\n' }}
{%- endif %}
{%- for tool_call in message.tool_calls %}
{%- if tool_call.function is defined %}
{%- set tool_call = tool_call.function %}
{%- endif %}
{{- '\n\n<function=' + tool_call.name + '>\n' }}
{%- if tool_call.arguments is defined %}
{%- for args_name, args_value in tool_call.arguments|items %}
{{- '<parameter=' + args_name + '>\n' }}
{%- set args_value = args_value if args_value is string else args_value | string %}
{{- args_value }}
{{- '\n\n' }}
{%- endfor %}
{%- endif %}
{{- '\n' }}
{%- endfor %}
{{- '<|im_end|>\n' }}
{%- elif message.role == "user" or message.role == "system" or message.role == "assistant" %}
{{- '<|im_start|>' + message.role + '\n' + message.content + '<|im_end|>' + '\n' }}
{%- elif message.role == "tool" %}
{%- if loop.previtem and loop.previtem.role != "tool" %}
{{- '<|im_start|>user\n' }}
{%- endif %}
{{- '\n' }}
{{- message.content }}
{{- '\n\n' }}
{%- if not loop.last and loop.nextitem.role != "tool" %}
{{- '<|im_end|>\n' }}
{%- elif loop.last %}
{{- '<|im_end|>\n' }}
{%- endif %}
{%- else %}
{{- '<|im_start|>' + message.role + '\n' + message.content + '<|im_end|>\n' }}
{%- endif %}
{%- endfor %}
{%- if add_generation_prompt %}
{{- '<|im_start|>assistant\n' }}
{%- endif %}