The server defines 4 tools with consistent naming patterns (verb_noun: get_current_time, calculate_difference, get_timestamp_context, adjust_timestamp). All tools have descriptions (100-200 chars, within baseline), and input schemas are fully visible in server.py with proper JSON Schema structure including types, descriptions, and constraints. However, there are notable gaps: output schemas are NOT documented (tools return text responses but the structure is not specified), some parameter descriptions lack actionable constraints (e.g., 'Timezone for parsing ambiguous timestamps' doesn't explain how ambiguous parsing is resolved), and error handling is not visible in the provided code excerpts. The get_timestamp_context tool has reasonable constraints (business_hours_start/end with min/max 0-23), but most parameters lack format validation hints. No enum constraints are present where they could reduce hallucination (timezone could benefit from a curated list). Parameter descriptions are present for all but lack the level of detail (e.g., 'ISO format or human readable' is vague, what datetime formats exactly?). The tool composition is sound (each tool does one thing), but the lack of documented output structure and limited error guidance prevent a higher score.

• Document the output schema for each tool. Add a 'Response Format' section to the tool description or provide a JSON Schema for the response structure. Example: get_current_time returns {iso_timestamp: string, formatted_timestamp: string, unix_timestamp: number}. This enables LLMs to extract the correct field and plan chaining calls.
• Replace free-form timezone strings with either (a) an enum of common timezones, or (b) a clear description: 'Use IANA tz database identifiers (e.g., UTC, US/Pacific, Europe/London, Asia/Tokyo). See https://en.wikipedia.org/wiki/List_of_tz_database_time_zones for valid values.' This prevents invalid inputs.
• Specify exact timestamp formats accepted. Instead of 'ISO format or human readable', state: 'ISO 8601 format (e.g., 2024-01-15T10:30:00Z) or common human-readable formats (e.g., 2024-01-15, Jan 15 2024, tomorrow). Ambiguous dates are resolved using the timezone parameter.'
• Add validation examples to parameter descriptions. E.g., for delta_unit: 'The unit of the duration to add or subtract (one of: weeks, days, hours, minutes, seconds). Example: delta_unit='hours' with delta_value=2 adds 2 hours.'
• Implement explicit error handling with actionable messages. When a timezone is invalid, return: 'Invalid timezone: {value}. Must be a valid IANA tz database identifier. Examples: UTC, US/Pacific, Europe/London.' When timestamp parsing fails, return: 'Could not parse timestamp: {value}. Supported formats: ISO 8601 (2024-01-15T10:30:00Z), date (2024-01-15), or relative (tomorrow, next Tuesday).'