Natural Language Interface for LLM Tool Calling
Use natural language as the interface for tool calling in LLMs.
Replace rigid API schema-based invocation with natural language as the interface for tool calling.
Each tool is wrapped with an LLM interface that handles schema resolution and execution internally. This enables natural inter-tool communication for nested and multi-turn tool calling.
Instead of specifying `tool_name(param1='value1', param2='value2')`, an LLM can interpret a request like 'Use the weather tool to find the forecast for London.'
Adopt a natural language interface for LLM tool calls. This approach abstracts away complex schemas, allowing LLMs to interact with tools more intuitively and enabling better multi-step execution.
Natural language interfaces simplify tool interaction for LLMs, making it easier to chain tools and manage complex, multi-turn tasks without explicit schema management.
- Harness Engineering in LLM Tool Use via Agent-Native Reusable Tool Primitives ↗arXiv · arXiv cs.AI · Sep 1, 2026 · paraphrased
First seen on Subvolts Sep 1, 2026. Updated Sep 11, 2026. Spotted a problem? Tell us.
- Harness Engineering in LLM Tool Use via Agent-Native Reusable Tool PrimitivesAnthropic · arXiv cs.AI · Sep 1, 2026
- Harness Engineering in LLM Tool Use via Agent-Native Reusable Tool PrimitivesGoogle · arXiv cs.AI · Sep 1, 2026
- Harness Engineering in LLM Tool Use via Agent-Native Reusable Tool PrimitivesOpenAI · arXiv cs.AI · Sep 1, 2026
The Playbook: reusable how-tos, prompts, configs and tips pulled out of the news.
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Questions people ask
- Which AI tools does this work with?
- Any current model. It was seen with in the sources.
- Where did this come from?
- arXiv (arXiv cs.AI). Subvolts collected, normalized and credited it; the link above opens the original.

