What must happen before an application executes a model tool call?

Applies parsing, schema and domain validation, authorization, confirmation, idempotency, limits, and audit before execution.

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TL;DR

The application parses and validates the tool call, resolves identity from trusted session state, checks authorization and domain rules, and enforces limits before execution. Consequential or irreversible actions may require explicit user confirmation. The model proposes the call; normal application security decides whether it can run.

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Practice focus

Whether a model request is treated as untrusted intent rather than permission to perform a side effect.

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Answer path

Core answer first, then checkpoints toward a stronger answer.

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Core answer
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Overview
Strict tool schemas improve argument shape. They do not authorize the operation or prove that it is appropriate.
The application parses and validates the tool call, resolves identity from trusted session state, checks authorization and domain rules, and enforces limits before execution. Consequential or irreversible actions may require explicit user confirmation. The model proposes the call; normal application security decides whether it can run.
Checkpoint
Stronger answer
Optional upgrade with examples, trade-offs, and sharper phrasing.
For cancelOrder, I ignore any model-supplied customer identity and load the order through the authenticated tenant boundary. I then check its current state and require confirmation when cancellation has a cost. Retried side effects use an idempotency key, and the tool returns a typed business result rather than pretending every failure is a model problem.

Review signals

Use these to catch weak phrasing, shallow reasoning, and risky claims.

Common mistakesCandidateCommon mistakesMistakes that weaken the answer or signal shallow understanding.Open details

Details

Executing immediately after JSON-schema validation.
Trusting identity or role fields produced by the model.
Retrying a side effect without idempotency.
Using a prompt instruction as the only approval control.

What must happen before an application executes a model tool call?

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