This is NOT an MCP server, it is a Python SDK for calling AgentSIM's OTP relay service. The 6 'tools' are actually SDK methods exposed as if they were MCP tools, but there is no MCP server implementation visible in the source. Tool definitions lack proper MCP registration, transport mechanism, or protocol compliance. Descriptions are present but generic (e.g., 'Open an SMS challenge session. Alias of provision. Same objects.'). Schemas are partially documented but lack depth. Two tools (provision, open_challenge) are exact duplicates with identical descriptions and parameters, violating the single-responsibility principle. Parameters like 'on_reregistration_needed' are typed as 'object' with no schema detail. No error handling guidance, no output schemas documented, no pagination support despite async operations.

• Convert this Python SDK into an actual MCP server using the MCP Python SDK (e.g., mcp library). Implement stdio or HTTP transport with proper MCP protocol handshake.
• Remove duplicate tools: keep only 'open_challenge' and 'wait_for_verdict'. Delete 'provision' and 'wait_for_otp' aliases, or document them as deprecated.
• Expand tool descriptions to 100 - 200 characters. Example: 'Open an SMS challenge session for agent verification. Returns a session ID and provisioned phone number. Use wait_for_verdict() to poll for OTP receipt. Sessions timeout after ttl_seconds; no charge if OtpTimeoutError is raised.'
• Replace 'on_reregistration_needed' object parameter with explicit callback fields or remove it entirely. If a callback is needed, document the expected signature (e.g., 'async callable(session_id: str) -> None').
• Document output schemas for each tool. Example for open_challenge: '{"session_id": string, "number": string, "expires_at": ISO8601 timestamp}'. Include all fields the agent needs for downstream calls.