Artifacts are not processed by the subagent through prompt instructions - Guidance required

[subbu4github]

I am having a coordinator agent, which will ask series of question and ask the user to upload files based on the user response. I am using save artifacts as plugin, so as and when the user uploads the file its getting created as artifacts. I am storing the name of the artifacts in the state variable. Based on the input I am transferring the control the subagent who can answer the user query. I have given the load_artifacts tool to the sub agent. In the prompt instruction, I have mentioned that """read the artifact {state variable name}. analyse the content and address the user queries....""". But the subagent is not reading the artifact and not producing any output. I tried switch it from subagent to AgentTool. Even in that case the result is same. How to address this issue. Any guidance in this regard is much appreciated. Thanks.