{"repo":"respawn-llc/tool-filter-mcp","free":true,"listed":false,"github":"https://github.com/respawn-llc/tool-filter-mcp","clone":"git clone https://github.com/respawn-llc/tool-filter-mcp.git","description":"MCP proxy server that filters tools from upstream MCP servers via regex-based deny list","language":"TypeScript","stars":36,"topics":[],"license":"MIT","category":"mcp-servers","readme_excerpt":"tool-filter-mcp MCP proxy server that filters tools from upstream MCP servers via regex-based deny list. Maintained: ✅ Yes (Spring/summer 26) Why use this? For effective context engineering, we want to minimize useless tokens. Most major agents right now (e.g. Claude Code) do NOT remove tool descriptions from the context. Even though the tool is completely denied and unused, the model will still get its entire description and still try to call the tool (and get error messages). For big MCPs, such as github, supabase, jetbrains IDE, atlassian, this is catastrophic to the context and leads to context pollution by 40-60k of useless tokens. You wanted your agent to be able to see jira ticket descriptions? Please also have these 44 useless tools to edit assignees on confluence pages. This MCP completely solves the issue without introducing any overhead. Contributions welcome! Installation Usage Basic Example (HTTP/SSE) Filter tools matching . file$ pattern from an HTTP MCP server: Basic Example (stdio) Filter tools from a local stdio MCP server: With Environment Variables (stdio) Pass environment variables to the upstream stdio server: Multiple Patterns Use comma-separated patterns: With Authentication Headers Add custom headers for authentication: Headers support environment variable expansion (if not yet expanded by your app): List Available Tools Discover what tools are available before setting up filters: With Claude Code HTTP/SSE Upstream Server Add to your .mcp.json : With a","default_branch":null,"files":null,"tree":[],"storefront":"/r/respawn-llc","claimed":false,"request_supported":{"post":"https://gitbuyer.com/r/respawn-llc/tool-filter-mcp/request-supported","requests":0},"note":"indexed from public GitHub; nothing is for sale on this page. Clone it from GitHub. Paid listings live at /search."}