Three well-named tools with consistent verb-noun naming (get_*). All tools have descriptions, but they are brief (45-90 chars) and lack context about WHEN to use each tool or HOW they differ. Input schemas are present and properly typed with descriptions for all parameters. However, output schemas are NOT documented anywhere in the visible code, the rubric explicitly requires documented return types for A+ quality. Tool definitions are visible in test files (not main source), suggesting they may be inferred rather than directly registered. The codebase demonstrates good engineering practices (BaseTool abstraction, dependency injection, proper tool registration) but falls short on LLM-facing documentation.

• Add outputSchema to all three tools. For get_financial_statements, document fields like {'income_statement': [{year, revenue, net_income, ...}], 'balance_sheet': [...], 'cash_flow': [...]}. Specify max results and pagination.
• Expand tool descriptions from ~70 chars to 150 - 250 chars following the pattern: 'Returns [WHAT]. Use this when [WHEN]. For [RELATED_ACTION], use [OTHER_TOOL] instead. Requires [PREREQUISITES].'
• Add enum constraints to get_financial_statements 'period' parameter: restrict to ['annual', 'quarterly'].
• Document what 'recent' means in get_sec_filings: e.g., 'Returns up to 50 most recent SEC filings from the past 10 years, sorted by filing date (newest first).'
• Add parameter constraints in descriptions: 'ticker must be 1 - 5 uppercase letters' for all three tools.
• Create explicit tool implementation files in lib/mcp/tools/ rather than relying on test definitions. Move tool specs from test/integration/server_integration_test.dart to production code.
• Add recovery guidance: 'If ticker is not found, try search_companies() with a company name. If no filings are found, verify the company is SEC-registered (US-domiciled public companies only).'

Inferred effective spec: 2025-06-18+.

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