Use this read-only tool to compare one crypto public company against its current peer group. It returns peer rank, peer percentile, peer score, stressed leverage, risk tier, debt coverage, quality flags, linkbase provenance, and period/source-date context. Parameters: ticker is required and must be one public-company symbol such as COIN, MSTR, MARA, RIOT, HUT, or CLSK; period is optional and only for reproducing a known filing date. Behavior: read-only and idempotent; it performs one HTTPS read, has no destructive side effects, and does not write external systems or access user accounts. Use it when the user asks whether one issuer is better or worse than peers; use covenant_stress for absolute stress, top_stressed for universe-wide ranking, and alpha_signals for opportunity signals.