Unverified50% confidenceFactExact time
The Anthropic API's tool search tool marks tools with `defer_loading: true`; the definitions are still transmitted with the tools array, but by default the model sees at most the five tools returned by search each time, which Anthropic says typically reduces definition tokens by more than 85%.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/17/2026
First Seen
Valid until: 1/15/2027
Sources
Related Entities
Related Claims
UnverifiedThe searchable tool catalog reduces context usage from O(total number of tools) to O(number of tools relevant to the current task)66% similarUnverified相比通用语义检索，结构化API调用（Tool Use）能返回精确的数据字段，适合处理品牌配色等精确数值查询，而传统向量检索存在召回率和精确率的权衡65% similarUnverifiedv3.25.0 adds support for tool search and introduces the defer_loading=true option in typed function helper tools (#4029).64% similarUnverifiedTool Retrieval uses vector search to first filter out the 3–5 most relevant tools before providing them to the model.63% similarUnverifiedThe Adaptive Instructed-Retriever dynamically adjusts search depth based on actual needs, rather than executing a fixed number of retrieval steps.62% similar
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