Server has 9 tools with basic schemas and descriptions, but significant quality gaps. All tools have descriptions (10-100 chars, mostly adequate) and input schemas with type definitions. However, parameter descriptions are sparse or missing context. Tool naming follows verb_noun convention (list_, create_, get_, set_, toggle_) which is good. Critical issues: (1) No output schemas documented anywhere, LLMs cannot plan downstream calls or extract results. (2) No error handling guidance, tools return raw exception strings like 'Error reading directory...' with no recovery hints. (3) Parameters lack constraints (e.g., set_system_volume accepts 0-100 but no min/max in schema). (4) No pagination support for list_directory despite potential for large results. (5) Security concerns: create_email_draft and create_note_draft use unescaped AppleScript string interpolation, vulnerable to injection. (6) Tool descriptions are functional but terse, most under 100 chars, missing WHEN/WHY context. Baseline: 194 chars average for A+ tools; these average ~65 chars.

• Document output schemas for all tools. E.g., list_directory should return {type: 'object', properties: {contents: {type: 'array', items: {type: 'string'}}, path: {type: 'string'}, error: {type: 'string'}}}.
• Add error classification and recovery hints. Replace 'Error reading directory...' with 'Permission denied for /path/to/dir. Verify read permissions or try a parent directory.' Include retryable vs fatal classification.
• Escape AppleScript parameters using proper quoting. Use Foundation.NSString or similar to safely escape quotes, newlines, and special chars in create_email_draft and create_note_draft.
• Expand parameter descriptions to 50-100 chars with format/constraint hints. E.g., 'path: Absolute or relative filesystem path. Supports ~ for home. Returns error if path does not exist or lacks read permission.'
• Add min/max constraints to numeric parameters. E.g., set_system_volume level: {type: 'integer', minimum: 0, maximum: 100, description: 'Volume level from 0 (mute) to 100 (max)'}.