COLT: Enhancing Video Large Language Models with Continual Tool Usage

• URL: http://arxiv.org/abs/2509.18754v2
• Date: Wed, 24 Sep 2025 07:53:56 GMT
• Title: COLT: Enhancing Video Large Language Models with Continual Tool Usage
• Abstract summary: We propose COntinuaL Tool usage (termed COLT), which automatically acquires tool-use ability in a successive tool stream.<n>Our COLT incorporates a learnable tool codebook as a tool-specific memory system.<n>To unleash the tool usage potential of video LLMs, we collect a video-centric tool-use instruction tuning dataset VideoToolBench.
• Score: 9.709506072510512
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The success of Large Language Models (LLMs) has significantly propelled the research of video understanding. To harvest the benefits of well-trained expert models (i.e., tools), video LLMs prioritize the exploration of tool usage capabilities. Existing methods either prompt closed-source LLMs or employ the instruction tuning paradigm for tool-use fine-tuning. These methods, however, assume an established repository of fixed tools and struggle to generalize to real-world environments where tool data is perpetually evolving and streaming in. To this end, we propose to enhance open-source video LLMs with COntinuaL Tool usage (termed COLT), which automatically acquires tool-use ability in a successive tool stream without suffering 'catastrophic forgetting' of the past learned tools. Specifically, our COLT incorporates a learnable tool codebook as a tool-specific memory system. Then relevant tools are dynamically selected based on the similarity between user instruction and tool features within the codebook. To unleash the tool usage potential of video LLMs, we collect a video-centric tool-use instruction tuning dataset VideoToolBench. Extensive experiments on both previous video LLM benchmarks and the tool-use-specific VideoToolBench dataset demonstrate the state-of-the-art performance of our proposed COLT.

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