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Equation 3 · Part 1 · Typed Tools: Protocols as an Agent's Action Alphabet

Symbol R_t

Rt\mathcal{R}_t
Rt\mathcal{R}_t

What this part means

the result type : what the caller is told.

Its job in the formula

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

Where the article explains it

Rt\mathcal{R}_t is the result type : what the caller is told.

The passage around this formula

Rt\mathcal{R}_t is the result type : what the caller is told. The second Σ\Sigma is the side effect : what changed. These two are separate, and conflating them is the origin of most agent unreliability. A tool that returns {"status": "ok"} has a result type carrying roughly one bit while its effect on Σ\Sigma may be arbitrarily large. The caller — model and harness alike — has no way to verify that the bit is true.

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Learn the underlying idea

A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.

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Sources cited in the article section

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