Server has 16 tools with consistent verb-noun naming (get_, list_, create_, delete_, cancel_). All tools have descriptions (10-200 chars, within baseline). However, input schemas are present but lack formal enum constraints for constrained parameters (e.g., severity, status, scan_type accept free-form strings instead of enums). Output schemas are undocumented, tools return plain strings rather than structured objects, forcing LLMs to parse unstructured text. No pagination support despite list_* tools. Error handling is absent from visible code. Parameter descriptions are present but lack format/constraint details (e.g., 'max 40 characters' for tag name is good, but severity values are only in docstring, not schema). Security: API key injected via environment variable (correct pattern). Overall: solid naming and basic descriptions, but weak schema formalization and no structured output.

• Convert all tool outputs from plain strings to structured JSON objects. E.g., list_targets should return {targets: [{id, address, status}], total_count, next_cursor} instead of a formatted string.
• Add enum constraints to schema for all constrained parameters: severity in list_issues, status/scan_type in list_scans, scan_type in create_scan. Move enum values from docstring into JSON Schema.
• Implement pagination: add limit (default 20, max 100) and offset/cursor parameters to all list_* tools. Return total_count and next_cursor in response.
• Add error handling with actionable messages. Wrap API calls in try-catch; return structured errors like {error: 'user_not_found', message: 'User not found. Try list_users() to find valid users.', retryable: true}.
• Add confirmation step for destructive operations. Implement a two-step pattern: create_scan_confirmation(scan_id) returns a confirmation_token, then confirm_delete_target(target_id, confirmation_token) executes the delete.