Equation 10 · The Token Tax of Giving a Model More Tools
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A separate, applied study on enterprise agent routing gives a way to decompose exactly what breaks as a real tool catalogue scales, rather than only that something does. Scaling from 10 to 110 candidate agents or tools, the authors report routing F1 on under-specified requests dropping 16 to 23 percentage points across the models tested, and split that drop with an oracle analysis into two distinct components: a retrieval gap , the model’s failure to surface the correct tool at all, and a confusion gap , a roughly 10-percentage-point reduction in the theoretical best-case score that persists even when retrieval is assumed perfect [ 11 ] . Written as a decomposition of the error a shortlist…
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A separate, applied study on enterprise agent routing gives a way to decompose exactly what breaks as a real tool catalogue scales, rather than only that something does. Scaling from 10 to 110 candidate agents or tools, the authors report routing F1 on under-specified requests dropping 16 to 23 percentage points across the models tested, and split that drop with an oracle analysis into two distinct components: a retrieval gap , the model’s failure to surface the correct tool at all, and a confusion gap , a roughly 10-percentage-point reduction in the theoretical best-case score that persists even when retrieval is assumed perfect [ 11 ] . Written as a decomposition of the error a shortlist of size m drawn from a full catalogue of n tools produces, where is the one the request actually calls for and is the shortlist shown to the model:
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