MemoryVault MCP presents a moderately well-defined tool set with solid parameter schemas and mostly clear descriptions. All 7 tools have explicit input schemas via Pydantic models and descriptive text. However, there are significant gaps in output schema documentation (no documented return types visible), error handling guidance is missing entirely, and several tools exhibit overly broad responsibilities that violate single-concern design. The schema quality is above average (most params have type+description), but the lack of output documentation and error recovery patterns pushes the score into the 'Fair' range. Tool naming is clear and verb-driven, descriptions are adequate (100-250 chars range, within baseline), but composition issues (e.g., get_feature_memory_context doing too much) and missing error guidance prevent a higher score.

• Document complete output schemas for all tools. For each tool, specify the JSON structure of the response, including field names, types, and descriptions. Example: resolve_feature_memory should document [{feature_id: string, confidence_score: number, story_key: string, ...}]
• Add error recovery guidance to all tool descriptions. State what can go wrong and what the LLM should do: 'If feature_memory_id not found, try search_discussions() with related keywords.' Use the recovery-guide pattern.
• Decompose get_feature_memory_context into focused tools: get_feature_discussions, get_feature_attachments, get_feature_branches, get_jira_link. Keep get_feature_memory_context as a convenience wrapper that calls all four and merges results.
• Add pagination support to search_discussions and get_discussion_timeline. Include cursor/offset + limit in requests, and return total_count + next_cursor in responses. Document max result limit (e.g., 'results capped at 100 per call').
• Expand list_related_branches description to 50+ chars. Explain what 'repository information' includes and when to call this tool (e.g., 'Call this to find git branches linked to a feature for checkout or review').
• Add tool annotations to all tool definitions. Mark all tools as readOnlyHint=true since none modify state. Example: Tool(..., readOnlyHint=True).
• Add parameter validation constraints. For date params (fromDate, toDate), document format (ISO 8601) and valid range. For limit param, document bounds (e.g., 'must be 1-100'). Add enum constraint to decisionType if values are restricted.

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

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry