Run arbitrary shell commands on the host using /bin/bash -lc.

Use this only when shell/CLI execution is actually required and dedicated tools are insufficient.

Supports full shell syntax (pipes, redirects, command chaining, subshells).

Before commands with meaningful side effects (writes/deletes/system changes), briefly state what you will do.

Returns exit code, stdout/stderr, timeout/truncation flags, and execution metadata.

When spill_to_managed_file is enabled and output exceeds spill_after_chars, the response contains
stdout_file_absolute_path instead of inline output. Use grep or file-reading tools on that path.
