The server implements 8 well-scoped read-only tools for Dify knowledge base access. Tool naming follows verb_noun conventions (list_, search_, show_, get_) with clear action intent. All tools have descriptions exceeding 20 characters and input schemas with type definitions visible in src/index.ts. However, critical gaps emerge: (1) output schemas are NOT documented, responses are returned as JSON strings with no documented field structure, breaking the ability for LLMs to understand what data is available downstream; (2) parameter descriptions are generally good but lack actionable format constraints (e.g., no regex patterns, min/max for numeric fields, or enumeration boundaries for top_k, limit, page); (3) no error handling guidance is visible, tools return raw API responses with no recovery instructions; (4) no evidence of input validation or sanitization despite accepting user-provided queries; (5) pagination fields (page, limit) lack bounds documentation; (6) response fields do not include chaining IDs needed for multi-step workflows (e.g., after searching, can you call get_segment_detail with the returned segment_id?). Average per-tool definition score: 62. The architecture is sound (clean separation of tools, proper SDK integration), but LLM usability and error resilience are underdeveloped.

• Add documented output schemas for each tool. Return a ToolResult object with typed fields instead of raw JSON strings. Example for dify_list_knowledge_bases: return {data: [{id: string, name: string, description: string, document_count: number}], total: number, limit: number}.
• Add min/max bounds to pagination parameters: limit (1-100, default 20), page (1-infinity, default 1). Update descriptions: 'limit: number (1 - 100, default 20), maximum results per page'.
• Implement input validation in DifyKnowledgeTools class. Validate knowledge_base_id format, ensure query length > 0, constrain top_k to 1-50, validate search_method against enum. Return clear validation errors: 'Invalid top_k: got 999, must be 1 - 50.'
• Add try-catch and timeout handling in tool handlers. Return structured errors with recovery guidance: 'Knowledge base not found. Call dify_list_knowledge_bases() to see available bases.' Include retryable/non-retryable classification.
• Document status enum for dify_get_document_segments as z.enum(["completed", "processing", "failed"]) instead of free-form string. Same for other constrained fields.
• Add response field documentation inline: after each tool handler, document the exact shape of the returned JSON. Update src/index.ts with JSDoc blocks describing { data: [...], meta: {...} } structure.
• Include chaining IDs in responses. E.g., dify_search_knowledge_base should return segment_id and document_id for each result so downstream dify_get_segment_detail can be called directly.

Inferred effective spec: <=2025-11-25.

• Relies on Stateful initialize / Mcp-Session-Id (removed; protocol is stateless) - make each request self-contained