Tech Debt MCP demonstrates solid definition quality with well-structured schemas, consistent naming conventions, and comprehensive parameter descriptions. All 16 tools follow verb_noun naming (analyze_*, get_*, list_*, add_*, remove_, etc.). Input schemas are fully defined with proper JSON Schema types, enums where appropriate, and descriptions for all parameters. However, there are gaps in output schema documentation, inconsistent error guidance, and some tools lack explicit recovery instructions. The server shows maturity in parameter validation (e.g., minLength/maxLength on 'code' param in execute_custom_rules, enum constraints on severity/category), but output shapes are not formally documented in the source, requiring LLMs to infer structures. Tool descriptions average ~100-150 chars (within baseline range), and all critical parameters have descriptions. Composition is strong: tools are narrowly scoped (add_custom_rule vs remove_custom_rule vs list_session_custom_rules vs execute_custom_rules), and tool chains appear well-designed (validate_custom_pattern → add_custom_rule). Security is appropriately simple (read-only analysis tools, no credentials in params). Main weakness: output schema documentation is missing from the tool definitions themselves.

• Add formal output schema documentation to every tool in the tool definitions. Example: 'Returns an object with keys: {issues: [{id, type, severity, file, line, message, suggestion}], metrics: {totalLines, totalIssues, ...}, summary: {criticalCount, highCount}}'. This enables LLMs to extract and chain data correctly.
• For analyze_project, add error guidance: 'Throws: ENOENT (path not found), EACCES (permission denied), UNSUPPORTED_LANGUAGE (no analyzer for detected language). Recovery: verify path is absolute and readable; retry with subset of languages.',
• For list_session_custom_rules, simplify description: 'List all custom debt-analysis rules created in this MCP session via add_custom_rule (does not include rules from .techdebtrc.json). Returns array of {id, pattern, message, severity, category, languages, flags}.'
• Add pagination parameters (limit, offset or cursor) to analyze_project, get_issues_by_severity, and get_issues_by_category. Cap default limit to 50, document max at 100. Return {items: [...], total, nextCursor} structure.
• Add maxFiles maximum constraint in analyze_project schema: 'maximum: 10000' to prevent resource exhaustion.
• Enhance add_custom_rule description with validation behavior: 'Creates a new regex-based rule. Rule is not persisted to disk (session-only via MCP state). If regex is invalid, returns validation error with position. Call validate_custom_pattern first to catch errors early.'
• For execute_custom_rules, clarify mutually exclusive parameters: 'Either path (absolute file path, max 10 MB) or code (source code string, max 1 MB) must be provided; if both provided, code takes precedence. Language parameter auto-detected if omitted.'