Function applyExclusiveToolPolicy

coderd/x/chatd/chatloop/chatloop.go:1445–1460

applyExclusiveToolPolicy checks whether toolCalls violate the exclusive-tool policy declared by exclusiveToolNames. When a violation is detected it synthesizes deterministic policy-error results for every tool call and records size/error metrics so the exclusivity failure mode is visible to operator

(
	toolCalls []fantasy.ToolCallContent,
	exclusiveToolNames map[string]bool,
	metrics *Metrics,
	provider, model string,
)

// exclusivity failure mode is visible to operators. Returns
// (results, true) on violation; (nil, false) otherwise.
func applyExclusiveToolPolicy(
	toolCalls []fantasy.ToolCallContent,
	exclusiveToolNames map[string]bool,
	metrics *Metrics,
	provider, model string,
) ([]fantasy.ToolResultContent, bool) {
	blockingToolName, ok := firstExclusiveToolName(toolCalls, exclusiveToolNames)
	if !ok {
		return nil, false
	}
	results := exclusiveToolPolicyResults(toolCalls, exclusiveToolNames, blockingToolName)
	for _, tr := range results {
		recordToolResultMetrics(metrics, provider, model, tr)
	}
	return results, true
}

// recordToolResultMetrics observes tool result size and increments
// tool_errors_total when the result carries an error output. Mirrors