Open Economics provides 4 well-named, read-only tools with clear semantic purpose (search, get_dataset, get_schema, get_observations). All tools have descriptions (10 - 200 chars) and input schemas with typed parameters. However, output schemas are not documented in the visible code, responses are shaped via modelVisibleResult() but the structured return type is not formally declared. Parameter descriptions are minimal (e.g., 'Stable official dataset ID' lacks format/constraint details). Error handling is absent, no guidance on retryability, user-fixable errors, or recovery paths. The server correctly avoids secrets in parameters and uses read-only operations, but lacks pagination documentation and per-parameter validation rules.

• Document output schemas formally. Add a 'returns' section to each tool description specifying the structure of data, meta, and structuredContent fields, including field types and meanings.
• Enhance parameter descriptions with format/constraint details. E.g., 'id: Stable official dataset ID (alphanumeric, 2 - 50 chars, e.g., BR_IBGE_IPCA)' and 'q: Natural-language economic question (1 - 500 chars, e.g., "inflation rate 2024")'.
• Add error handling guidance. Document common failure modes (dataset not found, invalid date range, query timeout) and recovery steps (e.g., 'If dataset not found, call search() with a partial name').
• Clarify pagination for get_observations. Add offset/cursor parameter, document total count in response, and specify whether limit is a hard cap or a soft suggestion.
• Validate date parameters. Specify that start and end are inclusive, enforce start ≤ end, and return a clear error if the range is invalid (e.g., 'start must be ≤ end; got start=2024-12-31, end=2024-01-01').