Synapse Memory MCP has well-structured tool definitions with clear naming (verb_noun pattern), comprehensive parameter schemas, and good descriptions. All 6 tools follow consistent patterns with Zod-based validation and JSON Schema generation. However, output schemas are not formally documented in the tool specs, error handling lacks recovery guidance, and some parameter descriptions could be more prescriptive about constraints. The custom JSON Schema converter is functional but basic. No tool annotations (readOnlyHint/destructiveHint) are present despite clear risk classifications in the metadata.

• Add formal output schema declarations to each tool spec. Document the structure of the data field (e.g., 'Returns {hits: MemoryHit[], score: number}') so LLMs know what to extract.
• Implement tool annotations: add readOnlyHint: true to recall/list_memories/get_related/build_context, and destructiveHint: true to forget. Update the ToolSpec interface to include these fields.
• Enhance error messages with recovery hints. E.g., forget() should return 'No memory with id X. Call list_memories() to see available IDs.' instead of a bare 404.
• Add constraint details to parameter descriptions. E.g., 'Maximum number of memories to return (1 - 25, default 6)' instead of just 'Maximum number of memories to return (default 6).'
• Document pagination behavior in list_memories. Return total count and indicate whether more results exist (e.g., 'Showing 20 of 150 memories'). Add a next_offset field if limit+offset is exhausted.