Tool handoff is the practice of sending a task from a model or automation layer to a dedicated external function, API, or service instead of making the model do everything itself. In security systems, this is used for actions that need precision or policy enforcement, such as checking a file hash, running a sandbox scan, validating an identity claim, or calculating a risk score. The model decides when to delegate, while the tool performs the work deterministically.
This matters in cyber security because reliable routing reduces errors and limits guesswork. Defenders use tool handoff in SIEM, SOAR, EDR, and chatbot assistants to keep sensitive operations under controlled logic. Attackers may try to exploit poorly designed handoffs by feeding crafted inputs that trigger unsafe tool calls, broaden access, or leak data through over-permissive connectors. Good implementations therefore need intent checks, input validation, least privilege, and clear logging so delegated actions stay predictable and auditable.