Symbiont exposes 4 tools with complete JSON schemas and descriptions in Chinese. Naming follows verb_noun convention (list_nodes, visit, say, leave). Schemas are well-formed with required fields and additionalProperties: false. However, descriptions lack English translations (barrier for non-Chinese LLMs), parameter descriptions are minimal or absent (e.g., 'node_id' has only 'target node id' in Chinese), and output schemas are not documented. Error handling is present but generic. No tool annotations (readOnlyHint/destructiveHint) despite clear risk profiles (visit/say/leave are WRITE operations). Tool composition is sound, each has one responsibility and outputs chain correctly (visit returns conversation_id used by say/leave).

• Translate all tool and parameter descriptions to English (or provide bilingual descriptions). LLMs trained primarily on English will misinterpret Chinese descriptions or ignore them entirely.
• Document output schemas for each tool. E.g., visit returns {conversation_id: string, node: {id, type, name, description}}. say returns {response: string, tokens_used: number}. leave returns {new_nodes: [{id, type, name}]}.
• Add tool annotations: visit/say/leave should include destructiveHint: true (or idempotentHint: false for say, since it blocks and has side effects). list_nodes should have readOnlyHint: true.
• Expand parameter descriptions with format/constraint guidance. E.g., node_id: 'UUID of the target node. Obtain via list_nodes() first.' content: 'Message text (1-2000 chars). Will be processed by the node entity.'
• Implement error categorization and recovery hints. E.g., 'conversation not found (404)' → 'Call visit(node_id) to start a new conversation.' 'node not found (404)' → 'Call list_nodes() to see available nodes.'