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The most expensive field in the record. Treated accordingly.
A mobile number typically costs an order of magnitude more than a work email at every provider, which makes it the field where an unsupervised agent can burn a budget fastest.
That is why cost is declared before the call on the agent surface, and why this capability is the one most worth putting behind an explicit budget rather than leaving to a model's judgement.
The tool asks whether a mobile is actually required before spending on one. Most enrichment jobs do not need it and request it out of habit.
A per-record budget stops the waterfall before it reaches providers you did not intend to pay.
Check the number is a live mobile rather than a landline or a disconnected line, because a valid-looking number that never connects is worse than none.
ProvidersMobile data is the least commoditised of these fields — provider quality varies by region far more than for email.
Every one of these is a genuine constraint of the underlying data, not a gap we intend to close later. Anyone claiming otherwise is guessing on your behalf.
Honest limits
The playground shows what this looks like as an agent tool call and as plain HTTP — including what a miss and a refusal return. Illustrative, not live.