[FEATURE REQUEST] Claude Code - Disable specific functions in MCP to save Context Tokens

[AuthenTech-AI]

Currently in Claude Desktop, I can disable and enable specific functions within a MCP.

I searched the Documentation, asked Claude Code and have searched, but everything I've found said I could not disable specific MCP functions running in Claude Code.

My goal is to decrease the Context usage for MCP functions that I do not need.

Thanks!

[github-actions[bot]]

Found 3 possible duplicate issues:

1. https://github.com/anthropics/claude-code/issues/4906
2. https://github.com/anthropics/claude-code/issues/4380
3. https://github.com/anthropics/claude-code/issues/3206

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[hyper-lode]

We absolutely need this. When I start a Claude code chat, right off the bat 33% of my context window is taken up by MCP tools I never use.

to illustrate

when running /context I see just for the Supabase MCP:

 └ mcp__supabase__search_docs (supabase): 2.7k tokens
     └ mcp__supabase__list_tables (supabase): 437 tokens
     └ mcp__supabase__list_extensions (supabase): 395 tokens
     └ mcp__supabase__list_migrations (supabase): 395 tokens
     └ mcp__supabase__apply_migration (supabase): 468 tokens
     └ mcp__supabase__execute_sql (supabase): 457 tokens
     └ mcp__supabase__get_logs (supabase): 499 tokens
     └ mcp__supabase__get_advisors (supabase): 499 tokens
     └ mcp__supabase__get_project_url (supabase): 398 tokens
     └ mcp__supabase__get_anon_key (supabase): 400 tokens
     └ mcp__supabase__generate_typescript_types (supabase): 399 tokens
     └ mcp__supabase__list_edge_functions (supabase): 402 tokens
     └ mcp__supabase__deploy_edge_function (supabase): 707 tokens
     └ mcp__supabase__create_branch (supabase): 518 tokens
     └ mcp__supabase__list_branches (supabase): 424 tokens
     └ mcp__supabase__delete_branch (supabase): 413 tokens
     └ mcp__supabase__merge_branch (supabase): 420 tokens
     └ mcp__supabase__reset_branch (supabase): 453 tokens
     └ mcp__supabase__rebase_branch (supabase): 434 tokens

and yet I only ever use ONE of those, the mcp__supabase__execute_sql

[freezscholte]

Yes we really need to have this feature asap

[clafollett]

I've tried global deny permissions but that does not limit the context usage of the tool definition. This is my root ~/.claude/settings.json definition:

{
    "permissions": {
        "deny": [
            "mcp__atlassian__atlassianUserInfo",
            "mcp__atlassian__getAccessibleAtlassianResources",
            "mcp__atlassian__getConfluenceSpaces",
            "mcp__atlassian__getConfluencePage",
            "mcp__atlassian__getPagesInConfluenceSpace",
            "mcp__atlassian__getConfluencePageFooterComments",
            "mcp__atlassian__getConfluencePageInlineComments",
            "mcp__atlassian__getConfluencePageDescendants",
            "mcp__atlassian__createConfluencePage",
            "mcp__atlassian__updateConfluencePage",
            "mcp__atlassian__createConfluenceFooterComment",
            "mcp__atlassian__createConfluenceInlineComment",
            "mcp__atlassian__searchConfluenceUsingCql"
        ]
    }
}

After closing and reopening my claude session these tool calls are still consuming precious context:

[Nek-12]

Hey guys! Since there was no response and there was no tool to accomplish this task, I vibe-coded a proxy mcp with one purpose - to solve this problem.

https://github.com/respawn-app/tool-filter-mcp

Let me know if it works for you! So far I was able to remove 25+ tools at work and am not having any issues.

[hyper-lode]

Can someone from @ah-anthropic comment if this is on the roadmap or not?

[github-actions[bot]]

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[mrclrchtr]

That would still be very useful.