Server has 5 well-named tools with complete input schemas and descriptions. All tools follow verb_noun naming (gdrive_list_files, gdrive_search, etc.). Descriptions are present and adequate (100-200 chars), explaining WHAT each tool does and WHEN to use it. Input parameters have types and descriptions. However, output schemas are not documented, responses are formatted as plain text rather than structured JSON, forcing LLMs to parse unstructured output. Error handling is present but generic (no recovery guidance). No pagination metadata (total count, next_cursor) returned despite tools accepting page_size/page_token. Missing parameter constraints (e.g., page_size max 100 stated in description but not enforced in schema). Tool composition is sound, each tool has one responsibility.

• Document output schemas for all tools. Define structured JSON responses with typed fields (e.g., {files: [{id, name, mimeType, modifiedTime}], nextPageToken?, totalCount?}) instead of plain text.
• Add pagination metadata: return nextPageToken (or null if no more results) and totalCount so LLMs know when to stop fetching.
• Move parameter constraints into JSON Schema: use maxLength, maximum, enum, pattern properties instead of relying on description text.
• Enhance error messages with recovery guidance: 'Invalid file_id format. File IDs are 25+ alphanumeric chars. Use gdrive_search() to find the file ID.'
• Return structured metadata with gdrive_read_file: include {content, mimeType, fileName, size} so downstream tools can handle different file types correctly.