Constant MEMORY_LIST_TOOL 

pub(crate) const MEMORY_LIST_TOOL: &str = r#"{
  "name": "MemoryList",
  "description": "List your own native memory (brain) markdown files. Returns each file's filename, whether it is the index, its metadata_type, size in bytes, and last-modified time. Use it to see what you've remembered before reading or writing a specific file. Takes no arguments.",
  "inputSchema": {
    "type": "object",
    "properties": {}
  }
}"#;