Four tools with mixed quality. All have descriptions (10-80 chars, mostly short), but schemas are minimal or absent. pmatrix_status and pmatrix_field_status have basic input schemas; pmatrix_grade and pmatrix_halt lack input descriptions. Tool names follow verb_noun pattern but are domain-specific (pmatrix_*). No output schemas documented. Error handling and recovery guidance absent. No parameter validation rules or constraints visible. Naming is clear but descriptions are terse (avg 45 chars vs baseline 194 chars). This is a monitoring/governance tool, not a general-purpose API, which explains the sparse parameter sets, but descriptions still lack context for LLM selection.

• Document output schemas for all four tools. Specify fields returned by pmatrix_status (e.g. safety_grade, risk_score, mode, session_counters), pmatrix_grade (e.g. trust_grade, p_score, expiry, dashboard_link), pmatrix_halt (e.g. halt_status, timestamp), and pmatrix_field_status (e.g. connection_status, peer_count, local_posture).
• Expand tool descriptions to 100-200 chars. Add WHEN to use guidance: 'Call pmatrix_status to check current safety posture and session activity. Call pmatrix_grade to review behavioral trust history and P-score expiry.'
• Add confirmation step to pmatrix_halt. Return a confirmation token requiring a second call with that token to actually execute the halt. Or add a dry_run parameter that returns what would be halted without executing.
• Add parameter descriptions and constraints to pmatrix_halt reason: 'Optional reason (max 500 chars, alphanumeric + spaces). Logged to ~/.pmatrix/HALT for audit trail.'
• Add error handling guidance. Document what happens if session_id is invalid in pmatrix_status, or if the HALT file already exists in pmatrix_halt. Return actionable error messages, not silent failures.