Scenarios · Tool-call skippingD2 · Tool design

Tool-Call Skipping: When Claude Bypasses a Required Tool.

Tool-call skipping is a CCA-F D2 failure mode where the agent answers without invoking a tool that the orchestrator considers mandatory. The fix is almost always a schema constraint, not a prompt change. Browse the deep-dives below for canonical patterns and the structured remediation steps.

01 · Deep dives

Tool-call skipping patterns

Agent skips get_customer before lookup_order

12% bypass diagnostic

A 12% bypass rate on get_customer → lookup_order is almost never a model problem. Five concrete fixes the orchestrator can enforce.

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Last reviewed · Oct 16, 2026

Tool-call skipping patterns

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