Sentient OS exhibits significant definition quality gaps across 27 tools. While tool names follow verb_noun conventions (outlook_calendar_read, send_email, slack_send_message), descriptions are present but often generic and lack actionable context. Critical issues: (1) Input schemas visible in the provided sample show basic type declarations but lack comprehensive constraint documentation (e.g., no enums for operation types, no min/max for numeric fields). (2) Many parameters lack sufficient description depth, 'purpose' in outlook_calendar_read is described as 'Purpose of the read operation (iterative or context)' but does not explain when to use each value or consequences. (3) Output schemas are not documented in the provided source, LLMs cannot predict what fields are returned. (4) Error handling guidance is absent, no recovery hints or error classification. (5) Duplicate/overlapping tools (e.g., send_email, outlook_send_mail, outlook_create_draft, draft_email) suggest composition issues. (6) Security-sensitive operations (calendar creation, email sending) lack confirmation/dry-run patterns. Baseline: 94% of A+ tools have docstrings; this server has descriptions but they are shallow. Average param description in A+ tools is 72 chars; many here are 30-50 chars.

• Consolidate email tools: merge send_email, outlook_send_mail, draft_email, and outlook_create_draft into a single canonical send_email tool with optional draft_mode parameter. Similarly, consolidate reply/forward variants into reply_to_email and forward_email with optional draft_mode.
• Document output schemas for all tools. For outlook_calendar_read, specify: returns {events: [{id, subject, start, end, attendees, location}], total_count}. For list_messages, specify: returns {messages: [{id, subject, from, received_datetime, preview}], total_count, next_offset}.
• Add enum constraints and min/max bounds to parameters. For 'purpose' in outlook_calendar_read, declare enum: ['iterative', 'context']. For 'limit' in outlook_email_search, declare: minimum 1, maximum 25. For 'order_by', declare enum: ['receivedDateTime desc', 'receivedDateTime asc'].
• Enhance parameter descriptions with actionable guidance. Replace 'Purpose of the read operation (iterative or context)' with 'Purpose of the read operation. Use "iterative" for discovery (returns up to 4 events); use "context" for background info (returns up to 8 events). Affects discovery_cap and detail_cap.'
• Add error handling and recovery guidance to tool descriptions. For send_email, append: 'On failure, returns error code and reason (e.g., invalid_recipient, rate_limited). If rate_limited, retry after 60 seconds. If invalid_recipient, call search_users() to verify email address.'