Server has 20 well-named tools with consistent verb_noun patterns (list_, get_, search_). All tools have descriptions (avg ~80 chars, within baseline 34-392). Input schemas are present with types and enums for constrained fields (orientation, order_by, resolution). However, parameter descriptions are sparse or missing for many inputs, e.g., 'page' and 'per_page' lack guidance on valid ranges. Output schemas are not documented; responses are trimmed via helper functions but LLMs cannot see the structure. Error handling is minimal (null returns logged to stderr, no recovery guidance). No tool annotations (readOnlyHint, etc.). All tools are READ_ONLY and safe, but this is not declared in metadata.

• Add output schema documentation to each tool. Define the structure of trimPhotoSummary, trimPhotoFull, trimCollectionSummary, etc. as explicit JSON Schema objects in the tool definition. This enables LLMs to plan field extraction and downstream tool calls.
• Add range constraints to pagination parameters: 'page: number (1 - 999, default 1)', 'per_page: number (1 - 50, default 10)'. Include in parameter description the max allowed per_page and note that results are paginated.
• Add readOnlyHint: true to all 20 tool definitions. This signals to LLMs that tools are safe to retry on transient failures and do not modify state.
• Enhance error handling: instead of returning null, return structured error objects with actionable guidance. E.g., 'Photo not found. Try search_photos() with a keyword.' or 'Invalid color filter. Use hex codes (e.g. #FF0000) or color names (red, blue, green).'
• Expand parameter descriptions with format and constraint details. E.g., 'color: string (hex code like #FF0000 or color name like red, blue, green)' and 'query: string (1 - 100 characters, required)'.