Single tool with adequate naming (convert_time) and reasonable description (156 chars, within 10-1024 baseline). Input schema present with type and description. However, output schema is underdocumented, MsResponsePresenter exists but the actual response structure (success, result, error fields) is not formally declared in the tool definition itself. No error handling guidance for LLMs (e.g., 'Invalid time format' error does not suggest recovery steps). Tool is read-only and simple, but lacks production-grade error messaging and output documentation.

• Add formal JSON Schema output declaration to the tool definition: {type: 'object', properties: {success: {type: 'boolean'}, result: {type: 'string'}, error: {type: 'string'}}, required: ['success', 'result', 'error']}
• Enhance error messages with recovery guidance: 'Invalid time format. Accepted formats: "2 days", "10h", "1.5h", or a millisecond integer like "172800000". Try again with one of these formats.'
• Replace example values in parameter description with a regex pattern or enum constraint. E.g., 'A time string matching pattern: /^(\d+(\.\d+)?(ms|s|m|h|d|w|y)|\d+)$/ or a millisecond integer.'
• Clarify dual-mode behavior in tool description: 'Converts human-readable time strings to milliseconds (e.g., "2 days" → 172800000) or reverses the conversion (e.g., 172800000 → "2 days").'
• Add input validation constraints to parameter description: 'Maximum 100 characters. Must be a valid time string or numeric millisecond value.'