Tool Filter MCP

Tool Filter MCP is an open-source proxy server for Model Context Protocol (MCP) setups that lets users filter out tools from upstream MCP servers using powerful regex-based deny lists. It eliminates unwanted tools and their descriptions from large agent contexts, helping to reduce token bloat and avoid context pollution in systems like Claude Code and other agent frameworks. It supports both HTTP/SSE and stdio upstream servers and offers command-line usage with flexible patterns, environment variable support, and authentication headers. This tool is ideal for developers, platform engineers, and teams deploying MCP/agent stacks who want granular control over available toolsets.