My Gradle tasks don't show up in VS Code

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1

A question for the VS Code wizards:

I have a Gradle project where I have multiple tools (i.e. multiple classes with main methods) which I run from the command line. My build.gradle file (under the project root) looks like this:

plugins {
    id 'application'
}

repositories {
    ...
}

dependencies {
    ...
}

java {
    toolchain ...
}

tasks.withType(JavaCompile) {
    options.compilerArgs += ["-nowarn"]
}

application {
    // Define a dummy main class because we run main classes in various source files
    mainClass = '....console.DontUsePlainRun'
}

tasks.register("run-ToolA", JavaExec) {
    jvmArgs = ...
    group = ApplicationPlugin.APPLICATION_GROUP
    classpath = sourceSets.main.runtimeClasspath
    mainClass = '....ToolA'
}

tasks.register("run-ToolB", JavaExec) {
    jvmArgs = ...
    group = ApplicationPlugin.APPLICATION_GROUP
    classpath = sourceSets.main.runtimeClasspath
    mainClass = '....ToolB'
}

...

I run the tool classes on the command line like this:

$ gradle run-ToolA

or this:

$ gradle run-ToolB

…

This works perfectly!

However for debugging I would like to run the classes in VS Code via the Gradle for Java plugin. I have installed it, but I look at the Projects outline my run tasks don’t show up:
gradle-in-vscode

How can I debug my run tasks in VS Code?