Equation 4 · Part 1 · Typed Tools: Protocols as an Agent's Action Alphabet
Symbol Sigma
What this part means
Sigma 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
Sigma is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol Sigma→Article meaning
The passage around this formula
is the result type : what the caller is told. The second 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 may be arbitrarily large. The caller — model and harness alike — has no way to verify that the bit is true.
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
Open the illustrated variables: a letter stands for a value guide →
See this notation across published equations →
Sources cited in the article section
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