public Builder clearToolConfig() {
      bitField0_ = (bitField0_ & ~0x00000100);
      toolConfig_ = null;
      if (toolConfigBuilder_ != null) {
        toolConfigBuilder_.dispose();
        toolConfigBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Optional. Input only. Immutable. Tool config. This config is shared for all
tools
</pre>

<code>
.google.cloud.vertexai.v1.ToolConfig tool_config = 6 [(.google.api.field_behavior) = OPTIONAL, (.google.api.field_behavior) = IMMUTABLE, (.google.api.field_behavior) = INPUT_ONLY];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/CachedContent.java