Constant FLEET_LIST_TOOL 

pub(crate) const FLEET_LIST_TOOL: &str = r#"{
  "name": "FleetList",
  "description": "List every agent reachable from here (same data as DiscoverAgents), framed for fleet targeting: each entry's block_id is what FleetBroadcast/FleetBulkStop expect in their `targets` array. Use this before either of those to build your target list. Read-only. Takes no arguments.",
  "inputSchema": {
    "type": "object",
    "properties": {}
  }
}"#;