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Equation 16 · Part 1 · How Tool Protocols and the Model Context Protocol Actually Work

Symbol T_t

Tt\mathcal{T}_t
Tt\mathcal{T}_t

What this part means

TtT_t is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

Its job in the formula

TtT_t is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

The passage around this formula

…it named tool poisoning attacks demonstrated exactly that gap: a tool description can carry hidden instructions inside it — in their proof of concept, wrapped in an <IMPORTANT> tag — that a model reads in full as part of Tt\mathcal{T}_t while a host’s simplified UI shows the user only a short summary. Their working example was an innocuous-looking addition tool whose hidden instructions told the model to read local SSH keys and configuration files and smuggle their contents out through an unrelated parameter, while…

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