The server defines 6 tools with reasonable naming conventions and complete input schemas. Tool names follow verb_noun patterns (create_draft, update_last_draft, get_draft, list_recent_drafts, list_sites). Descriptions are present but generic, they state WHAT each tool does but lack guidance on WHEN to use each tool or dependencies between them. All tools have input schemas with typed parameters and descriptions. However, output schemas are NOT documented in the tool definitions, responses are inferred from code implementation. The `update_last_draft` tool depends on implicit session state, which creates a potential composition issue. Error handling exists but is basic (missing not found case returns structured JSON). No parameter constraints use enums where they could (e.g., 'status' in create_entry). Tool descriptions average ~100 chars, which is adequate but below the A+ baseline of 50-200 chars for LLM optimization. No security annotations or scope declarations visible.

• Document output schemas for all tools. Example: create_draft should return { entry_id: number, blog_id: number, title: string, status: string, message: string }. This lets LLMs understand what data is available after each call.
• Add parameter constraint descriptions: e.g., 'blog_id (positive integer)', 'limit (1 - 100, default 10)', 'title (1 - 500 characters)'.
• Refactor update_last_draft: either (a) remove it and require entry_id in all update calls, making the tool stateless, or (b) explicitly document the session dependency and add an error case in the description: 'Returns error if no draft has been created in this session.'
• Add error classification in tool descriptions and responses. Example: 'If the entry does not exist (error code 404), try calling list_recent_drafts to find a valid entry_id. This is not retryable.'
• Translate all descriptions and parameter docs to English for clarity and consistency. Descriptions in Japanese reduce LLM reasoning quality and hurt discoverability.
• Add per-tool guidance on dependencies. Example: create_draft description should mention 'Call list_sites first if you do not know the blog_id.'
• Consider adding a 'status' enum parameter to create_draft/update_draft if Movable Type supports multiple status values (Draft, Published, Archived, etc.).
• Document pagination behavior: if a blog has 500 drafts, does list_recent_drafts return 10 (default limit) or all? Add 'offset' or 'cursor' parameter if pagination is needed.