MCP-SERVER-POSTGRES

The `postgres.py` component implements robust SQL query validation (`validate_sql_query`) to restrict operations to `SELECT` statements only, prevent multiple statements, and filter dangerous patterns (e.g., SQL comments, file operations, stored procedures). This significantly mitigates SQL injection risks for its defined read-only functions. API keys and database credentials are managed via environment variables. The `sentiment.py` component includes a rate limiter for LLM API calls, preventing abuse, and attempts to parse LLM responses as JSON with a fallback for malformed output. No direct use of `eval` or `exec` is present. A potential future risk exists if the `update_sentiment` prompt (currently unimplemented in `postgres.py`'s `handle_call_tool`) were to be implemented without similar stringent input validation and parameterization.