Critical gaps across all dimensions. Tool definitions lack proper schemas, descriptions are minimal or missing, and parameter documentation is absent. Only 1 of 5 tools has a visible input schema in source code. No error handling guidance, no output schemas documented, and tool composition is unclear. The server appears to be a Streamlit dashboard with ad-hoc tool implementations rather than a production MCP server.

• Add explicit JSON Schema definitions for all tool inputs. For audit_invoice, define invoice_json_str as an object with required fields (vendor, amount, category, etc.) rather than a free-form string.
• Document output schemas for each tool. E.g., get_company_policy returns {max_limit_usd: number, requires_approval_above: number, allowed_vendors: [string], blocked_vendors: [string]}.
• Expand tool descriptions to 100-200 characters. Include WHEN to call (e.g., 'Call after extract_invoice_data succeeds'), WHAT it checks, and WHAT it returns. Current descriptions are 40-50 chars.
• Add error handling guidance: 'If policy not found for category, returns {error: string}. Retry with category="general" or ask user to specify a valid category.'
• Implement confirmation/dry-run for execute_settlement. Add a 'dry_run' boolean parameter and return a preview of the payment mandate before execution.

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

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