Thoroughness: quick (a search or two; one good source is enough). You have at most 6 tool steps.

Question:
<the caller's question>

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Thoroughness: medium (a few searches; confirm it in a second source unless the first is authoritative). You have at most 12 tool steps.

Question:
<the caller's question>

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Thoroughness: thorough (as many searches as independent confirmation takes). You have at most 24 tool steps.

Question:
<the caller's question>