Three tools with strong naming (verb_noun pattern: discover_api, describe_api, call_api) and comprehensive descriptions (180-280 chars each). All parameters have type definitions and descriptions. Tool descriptions include workflow guidance and error recovery hints. However, output schemas are not formally documented in the visible code, responses are inferred from implementation. Parameter descriptions are detailed but could be more concise. No enum constraints on string parameters. Error handling is present but generic (returns JSON error objects without actionable recovery guidance beyond 'apply for access').

• Add formal JSON Schema definitions for tool outputs. Document discover_api response as {serviceId, serviceName, provider, description}[], describe_api as {operations: [{url, method}], request_parameters: [{name, type, required, description}]}, and call_api as {data, totalCount, error?}.
• Enhance error responses with classification and recovery hints. E.g., 'Invalid params JSON (user-fixable): Expected flat object with string values only. Example: {"pageNo":"1","numOfRows":"5"}' instead of generic 'Invalid params JSON'.
• Simplify the 'params' parameter description. Replace escaped-quote example with a plain JSON object example and clarify: 'Pass as a JSON string, e.g., params='{"pageNo":"1","numOfRows":"5"}'.
• Document pagination behavior in discover_api: state that results are capped at pageSize (max 50) and include total count in response so LLM knows when to fetch next page.
• Add enum or pattern constraint to 'url' parameter in call_api. E.g., pattern: '^https?://apis\.data\.go\.kr/[0-9]+/[a-zA-Z0-9]+/[a-zA-Z0-9]+$' to guide LLM toward valid URLs.

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

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