diff --git a/cmd/acb/main.go b/cmd/acb/main.go
index 75cb58a..e45f1b0 100644
--- a/cmd/acb/main.go
+++ b/cmd/acb/main.go
@@ -37,9 +37,23 @@ func main() {
 		os.Exit(1)
 	}
 
-	prs := DoPrs(*proj, *ghusername, *start, *end)
-	issues := DoJira(*start, *end, *jiraUser)
-	vikunjaTasks := DoVikunja(*start, *end)
+	var prs map[string][]contributions.PullRequest
+	var issues []issues.Issue
+	var vikunjaTasks []vikunja.Task
+
+	// Only call tools if relevant flags are set
+	if *proj != "" || *ghusername != "" {
+		prs = DoPrs(*proj, *ghusername, *start, *end)
+	}
+
+	if *jiraUser != "" {
+		issues = DoJira(*start, *end, *jiraUser)
+	}
+
+	if *employeename != "" {
+		vikunjaTasks = DoVikunja(*start, *end)
+	}
+
 	summ, err := SummarizeData(*employeename, prs, issues, vikunjaTasks)
 	if err != nil {
 		fmt.Println(fmt.Errorf("error getting PRs: %w", err))