Two tools with complete input schemas and descriptions, but significant gaps in parameter documentation and output schema clarity. Tool names follow verb_noun convention (create_*), which is good. Descriptions are present (194 - 250 chars) and meet baseline length. However, many nested parameters lack descriptions (e.g., 'numerator', 'denominator' in timeSignature; 'velocity' in notes). Output schemas are not documented, LLMs cannot predict what fields are returned. No error handling guidance. No tool annotations (readOnlyHint, destructiveHint, idempotentHint). Both tools are WRITE operations but lack confirmation/dry-run patterns.

• Document output schema for both tools. Example: {"success": boolean, "filePath": string, "fileSize": number, "message": string}. This enables agents to verify success and extract the file path for downstream use.
• Add descriptions to all nested parameters. For timeSignature: 'numerator: beats per measure (e.g., 4 for 4/4 time)', 'denominator: note value per beat (e.g., 4 for quarter notes)'. For notes: 'velocity: MIDI velocity 0 - 127 (default 95; higher = louder)'.
• Add error handling guidance in tool descriptions. Example: 'If outputDirectory does not exist, returns error with suggestion to create it first. If fret numbers exceed string count, returns validation error listing valid fret range.'
• Implement dry-run parameter for both tools. Add optional 'dryRun': boolean (default false) to preview file structure without writing. Return the would-be file path and structure for agent confirmation.
• Add tool annotations in ListToolsRequestSchema response. Set destructiveHint=true, readOnlyHint=false, idempotentHint=false for both tools so agents understand they modify state and should not retry blindly.