What it requires. A field the agent reads is empty on a large enough share of records that the answer is usually produced without it.
Why it matters. A field that exists and is mostly empty grounds nothing. The agent still reads it, still produces an answer, and the answer is built from whatever else was in the prompt.
How to fix it. Populate the field, or stop grounding on it and say in the topic scope that the agent cannot answer from it.
Source. Our grounding quality specification v1, section 3
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