ImageKit MCP has 7 tools with basic schemas and descriptions, but significant gaps limit production readiness. All tools have descriptions (10-100 chars, mostly adequate) and input schemas with type definitions. However, output schemas are undocumented, tools return free-text strings or unstructured dicts, forcing LLMs to parse responses. Error handling is minimal (generic try-catch with string messages). No parameter validation, no enum constraints, no pagination support. Naming is clear (verb_noun pattern: upload_file, delete_file, get_file_details), but descriptions lack actionable context (e.g., 'Upload a new file' doesn't explain when to use it vs alternatives). No tool annotations (readOnlyHint, destructiveHint, idempotentHint) despite 4 destructive tools. Composition is reasonable, tools are single-purpose, but output chaining is broken: upload_file returns 'file id: {upload.file_id}' as a string, not a structured field, so downstream tools cannot reliably extract it.

• Document output schemas for all tools. Define structured return types (e.g., {file_id: string, url: string, created_at: ISO8601} for upload_file) so LLMs can extract fields reliably.
• Add tool annotations: mark delete_file, delete_files, delete_folder with destructiveHint=true; mark get_file_details with readOnlyHint=true; mark create_folder with idempotentHint=true if safe to retry.
• Enhance parameter descriptions with constraints: 'folder_path (string, format: /path/to/folder, no trailing slash)', 'tags (array of 1-10 strings, max 50 chars each)', 'file_name (string, 1-255 chars, alphanumeric + ._-).'
• Implement structured error responses: return {success: false, error_code: 'FILE_NOT_FOUND', message: 'File {file_id} not found. Try get_file_details() with a valid ID.', retryable: false} instead of plain strings.
• Expand tool descriptions to 100-200 chars with context: 'Delete a single file by ID. Permanent and irreversible. Use delete_files() for bulk deletion. Requires file_id from upload_file() or get_file_details().'