CCDV-F objective 8.1 · Domain 8 · 10.6% of the exam
Tool Implementation
A tool is a name, a description and a schema, and selection runs on the description. Say when to call it and when not to, because a sentence explaining only what it does gives the model nothing to test an incoming message against. Failures return as results carrying an error flag rather than as exceptions, and an empty result is worse than an error, since the model cannot tell it from an honest answer of nothing. Dependent calls cannot be dispatched together.
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The rest of domain 8: Tools and MCPs
This domain is 10.6% of a scored form, about 6 of the 53, spread across 3 objectives. Drill the whole domain or pick another objective below.
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