Single tool 'metrika_catalog_list' has a Russian-language description that is descriptive but not optimized for LLM parsing. Input schema is empty object {} with no parameters documented. No output schema is visible in the provided source. The tool appears to be a discovery/informational tool (READ_ONLY risk), but lacks structured guidance on when to call it or what data it returns. Tool naming follows verb_noun pattern (acceptable), but the description is in Russian, limiting accessibility for English-speaking LLM agents. No parameter descriptions exist (empty input). No evidence of error handling, pagination, or output structure documentation.

• Add English-language description (50 - 200 chars) explaining: 'Lists all available Yandex Metrika API methods, including hidden ones and how to enable them. Call this first to discover available tools.' Current Russian description is inaccessible to most LLM agents.
• Define output schema documenting the structure of the catalog response (e.g., array of method objects with fields: name, description, api, parameters, etc.). This enables LLMs to extract and chain data.
• Add parameter descriptions for any input fields (currently empty {}). If truly no parameters, explicitly state 'No parameters required' in the description.
• Include error handling guidance: 'If the catalog cannot be fetched, the server may be unreachable or the token invalid. Verify network connectivity and authentication.'
• Expand description to clarify the relationship between this tool and the 108 Yandex Metrika methods mentioned in package.json. Help LLMs understand this is a discovery tool, not an execution tool.