Function tool_check 

pub fn tool_check(
    store: &LocalFsStore,
    flags: &OpFlags,
    env_id: &str,
) -> Result<OpOutcome, OpError>

op env tool-check <env_id>. Runs each binding’s crate::env_packs::EnvPackHandler::preflight and aggregates the per-binding crate::tool_check::ToolCheck results into a structured outcome.

Bindings whose kind is not registered (or whose version is rejected by the env-pack registry) surface as unresolved_bindings so the operator sees both shape errors and tool-preflight errors in one report. The built-in local handlers return empty checks (in-process, no external tools); handlers that shell out populate this from the named-tool catalog.