DipTrace MCP demonstrates solid domain-specific tool design with 20 well-named, verb-prefixed tools covering PCB/schematic analysis, library management, and BOM operations. All tools have descriptions (avg 95 chars, within 10-1024 range). Input schemas are present with typed parameters. However, output schemas are not documented in the provided source, parameter descriptions lack detail on constraints/formats, and error handling guidance is absent. Tool composition is strong (single responsibility, clear chaining via IDs), but descriptions could be more LLM-optimized per the 50-200 char baseline for A-grade tools.

• Document output schemas for all tools. For each tool, add a 'Returns' section specifying JSON structure, field types, and pagination metadata. Example: 'Returns: {components: [{id: string, name: string, pins: number}], total: number, offset: number}'.
• Add numeric constraints to offset/limit parameters. Specify min/max (e.g., 'offset: 0 - 1000000, limit: 1 - 100') and defaults (e.g., 'default limit: 20'). Include behavior when limit exceeds available results.
• Expand error handling in descriptions. For each tool, add 'Errors:' section listing possible failures (e.g., 'file not found', 'invalid schema', 'permission denied') and recovery guidance (e.g., 'Try scan_component_libraries() first to locate the file').
• Define complex parameter types inline or via reference. For 'evidence' and 'external_records' parameters, either inline the schema (e.g., 'evidence: {source: string, saved: string, reexport?: string}') or link to a schema document in the repository.
• Add tool annotations (readOnlyHint, destructiveHint) to clarify side effects. Mark record_roundtrip_evidence with destructiveHint=true and all read-only tools with readOnlyHint=true to help LLMs reason about safety and retry logic.