Single tool with excellent naming (verb_noun pattern), comprehensive parameter schema with proper constraints (min/max bounds, enums via descriptions), and detailed descriptions. Tool name 'convert_image_to_svg' clearly conveys action. All 11 parameters have type definitions and descriptions. Output is documented as string (SVG content). Tool annotations present (readOnlyHint, destructiveHint, idempotentHint). Main gaps: no output schema structure documented (just 'returns string'), no pagination/batching patterns (not applicable here), error handling could be more granular with recovery guidance.

• Document output schema explicitly: 'Returns SVG content as a UTF-8 string containing valid SVG XML markup. Typical output is 5-50 KB depending on image complexity and path_precision setting.'
• Enhance error messages with recovery guidance: 'Invalid base64 data: {e}. Ensure image_base64 is valid base64-encoded PNG/JPG/WEBP without data URI prefix.' and 'File too large ({file_size} bytes). Maximum allowed: {MAX_DOWNLOAD_BYTES // (1024 * 1024)}MB. Try reducing image dimensions or using a lower resolution source.'
• Add enum constraints to colormode and mode parameters in schema (currently described as free-form strings). Define: colormode ∈ {color, binary}, mode ∈ {spline, polygon, none}, hierarchical ∈ {stacked, cutout}.
• Include parameter dependency hint in description: 'Provide either image_base64 (for inline data) or image_url (for remote fetch), not both. If you have a file path, use file:// URL scheme (requires --allow-local-files-path server flag).'
• Add timeout guidance: 'URL fetches timeout after 30 seconds. For large remote images, consider downloading locally and passing via image_base64 or file:// URL.'