> This page is for NeMo Relay, version v0.10.3.
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> - v0.10.3: https://docs.nvidia.com/nemo/relay/v0.10.3/llms.txt
> - v0.10.2: https://docs.nvidia.com/nemo/relay/v0.10.2/llms.txt
> - v0.9.4: https://docs.nvidia.com/nemo/relay/v0.9.4/llms.txt
> - v0.8.4: https://docs.nvidia.com/nemo/relay/v0.8.4/llms.txt
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# Function nemo_relay_tool_conditional_execution

> Run the registered tool conditional execution guardrail chain.

Generated from `cargo doc --no-deps -p nemo-relay -p nemo-relay-adaptive -p nemo-relay-pii-redaction -p nemo-relay-ffi -p nemo-relay-types -p nemo-relay-plugin -p nemo-relay-worker-proto -p nemo-relay-worker`.

<pre />

Run the registered tool conditional execution guardrail chain.

This legacy helper blocks its caller. If called from a Tokio runtime, middleware must not depend on work driven exclusively by that caller thread.

Returns `NemoRelayStatus::Ok` if all guardrails pass, or `NemoRelayStatus::GuardrailRejected` if blocked.

## Parameters

* `name`: Tool name (null-terminated C string).
* `args_json`: Tool arguments as a JSON C string.

## Returns

Returns [`NemoRelayStatus::Ok`](/reference/api/rust-library-reference/nemo-relay-ffi/error/enum-nemorelaystatus) when execution is allowed and [`NemoRelayStatus::GuardrailRejected`](/reference/api/rust-library-reference/nemo-relay-ffi/error/enum-nemorelaystatus) when a guardrail blocks the call.

## Safety

All pointers must be valid.