Three tools with complete input schemas and descriptions. Naming follows verb_noun pattern (atheris_stock, atheris_proxy_url, atheris_usage). Descriptions are adequate (100-200 chars) and explain prerequisites (ATHERIS_PROXY_KEY requirement). However, atheris_stock and atheris_usage have empty input schemas with no parameters documented, limiting composability. atheris_proxy_url has well-structured parameters with enums and descriptions, but lacks output schema documentation. No error recovery guidance or actionable error messages. Missing tool annotations (readOnlyHint, idempotentHint). No pagination or result limits documented despite potential for large stock responses.

• Document output schemas for all tools. E.g., atheris_stock should return {stock: [{country: string, mbl: {capacity: number, ...}, peer: {...}}, ...]}. atheris_proxy_url should return {proxy_url: string, password: string, session_id: string, ...}. atheris_usage should return {remaining_gb: number, expiry_date: string, ...}.
• Add tool annotations: set readOnlyHint=true and idempotentHint=true on all three tools to signal they are safe to retry and do not modify state.
• Enhance error messages with recovery guidance. E.g., 'Country not found. Call atheris_stock first to see available countries.' or 'Request timed out after 20s. Retry with a different country or check network connectivity.'
• Mark sensitive response fields (proxy_url, password) as secret in the response schema or strip them before returning to the LLM. Alternatively, return only a reference/token that the agent can use internally without logging.
• Document pagination and result limits for atheris_stock. If stock can return hundreds of countries, cap at 50 and explain how to filter by pool or region.