Server implements 2 tools with basic but incomplete schemas and descriptions. Both tools have action-verb names (create_, list_) which is good. Schemas are partially defined but lack critical field descriptions for nested objects. The create_completion tool has a complex nested structure (messages array with role/content objects) that lacks per-field descriptions. Neither tool has documented output schemas. Error handling exists at the protocol level but tools lack recovery guidance. No input validation constraints (enums, ranges, limits) are exposed. Overall, this is a mediocre implementation that follows basic naming conventions but falls short on schema completeness, parameter descriptions, and output documentation.

• Add comprehensive output schema documentation for both tools. For create_completion, document that it returns {status: string, content: string, model: string, tokens_used: int, ...}. For list_models, document the array structure and per-model fields.
• Add descriptions to nested objects in the messages array. Each message object should note: 'role (string): either "user", "assistant", or "system". content (string): the text content of the message.'
• Introduce input validation with enums and constraints. For temperature, add minValue: 0.0, maxValue: 1.0 in schema. For model, consider documenting top supported models or noting 'See list_models for available options.'
• Expand list_models description to ~100-150 characters explaining purpose, return structure, and when to call it first. E.g.: 'Retrieve all available OpenRouter models with capabilities. Call this first to discover supported models and their properties before creating completions.'
• Document default behavior for optional parameters. Add to description: 'If temperature is omitted, defaults to 0.7. If max_tokens is omitted, OpenRouter defaults are used.'
• For the 'tools' parameter in create_completion, add schema and description. Specify that it should be an array of tool definition objects matching the OpenRouter tool schema format, or link to external documentation.
• Implement error recovery hints. If create_completion returns 'Unknown model', include in error message: 'Invalid model. Call list_models to see available options.'

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

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