The matome server exposes a single tool, get_matome, with critical definition quality gaps. The tool has a minimal description (32 chars: 'Get bookmark url for matome'), lacks any input parameter descriptions, and declares an empty input schema ('type: object' with no properties). The tool name is verb-prefixed and action-oriented (positive), but the schema is completely absent of type information, constraints, or documentation. No output schema is documented. Error handling returns generic text ('matome fetch Error!!', 'matome url list is none') without recovery guidance. The tool operates read-only against an external API (matome.ebi-generator.com) but the interface reveals no pagination, limits, or structure to results. See src/index.ts line 89-95: inputSchema is bare `{type: 'object'}` with no properties or descriptions.

• Add parameter definitions to the input schema. Even if the tool takes no user-facing parameters, document any environment variables or API configuration it requires (e.g., USER_ID is read from process.env but users have no visibility into that dependency). Add optional parameters like 'limit' (1-100, default 20) or 'filter_type' (enum if the API supports it).
• Expand the tool description to 50-150 characters answering: (1) WHAT: 'Retrieves a list of bookmarked URLs saved in the matome service.' (2) WHEN: 'Use this to fetch all saved bookmark URLs for a user.' (3) RETURN: 'Returns an array of URL strings.' (4) PREREQUISITE: 'Requires USER_ID environment variable to be configured.'
• Document the output schema explicitly in the tool response or in the description: '[{type: string, url: string}]' or 'Array of objects, each with {type, url}. Limited to 100 results per call.'
• Implement result pagination: add optional 'limit' (default 20, max 100) and 'offset' or 'cursor' parameters. Return a response structure like {results: [...], total_count: N, has_more: boolean, next_cursor: '...'} to enable iteration.
• Improve error handling with categorization and recovery hints. Example: 'API returned 500. This is retryable, the matome service may be temporarily down. Retry in 30 seconds or ask the user to check if the USER_ID environment variable is correctly set.' Use HTTP status codes to infer retryability (4xx = user-fixable, 5xx = retryable, etc.).
• Add parameter type definitions and descriptions even if the tool currently accepts no explicit parameters. Example: if 'type' filtering is available in the API, add it as an optional enum parameter with description 'Filter bookmarks by type (if supported by the API).'