Ocean Engine MCP server has solid naming conventions and visible input schemas defined via Go struct tags (jsonschema), but lacks several critical quality markers. All 6 tools follow verb_noun naming (oceanengine_get_*, oceanengine_list_*, oceanengine_update_*). Descriptions are present and moderately detailed (averaging ~120 chars), exceeding the 20-char minimum. Input schemas are explicitly registered via struct tags in server.go, providing type information and parameter descriptions. However, OUTPUT schemas are not documented, the code returns structured types (advertiserInfoOutput, oceanengine.CampaignList, etc.) but these types are not published in tool definitions or described in the tool documentation. Parameter descriptions are present but sometimes lack depth: 'page_size 1-100' is stated, but no example of when to use pagination is given. Error handling is present (advertiser_ids validation, required field checks) but error messages are basic and do not guide recovery or suggest alternatives. Write tools lack explicit confirmation/dry-run patterns, risking accidental mutation. Tool composition is clean, each tool has a single responsibility, though no batch variants are offered. Field naming between tools is consistent (advertiser_id, campaign_id, etc.). The server includes a feature flag (EnableWrites) for safe defaults (read-only by default), which is good practice.

• Document output schemas in tool definitions. For each tool, add an 'outputSchema' field or extend the description to specify the structure of the returned object (e.g., 'Returns: {advertisers: [{id, name, role, status, company, ...}]}'). This enables LLMs to plan chained calls and extract the correct fields.
• Formalize enum constraints in JSON Schema. Convert description examples to proper enum declarations: opt_status: enum ["enable", "disable", "delete"]; group_by and fields should reference a vocabulary or be documented with valid options (e.g., via a separate discovery tool like get_report_fields()).
• Add numeric min/max constraints to JSON Schema. Use minValue, maxValue, and minLength, maxLength for page, page_size, and budget parameters. Example: {"page": {"type": "integer", "minimum": 1, "description": "1-based page number; defaults to 1"}}.
• Implement confirmation/dry-run for write tools. Add an optional 'confirm' parameter (boolean, defaults to false) or implement a two-step pattern: first call returns a summary of changes ('Will delete campaigns: [123, 456]'), second call confirms the action. Alternatively, add a dry_run parameter to preview changes.
• Enrich error messages with recovery guidance. When a lookup fails, return available alternatives or suggest next steps. Example: 'Advertiser 9999 not found. Known advertisers: [1234, 5678]. Try get_advertiser_info with one of these IDs, or use a different advertiser_id.'
• Document pagination behavior explicitly. State in list_campaigns and list_ads descriptions: 'Returns up to page_size results. Include total_count and has_more in response. Use page parameter to iterate; stop when has_more is false or results are empty.'