MCP-SERVER

The 'calculate' tool uses `ast.parse` and a custom `safe_eval` function with a whitelist of operators and node types, effectively preventing arbitrary code execution and mitigating the risk typically associated with `eval()`. Database interactions use parameterized queries (`?`) to prevent SQL injection vulnerabilities. Secrets (like API keys for external services) are correctly handled through environment variables (in the client bot code), not hardcoded. The HTTP server defaults to binding on `0.0.0.0`, which is common for local development but should be reconfigured for production environments to a specific interface or secured behind a proxy.