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Agent Toolbox

by johngee518 · remote · no sign-in to list tools · v1.0.0 · published by GitHub user johngee518

Free, no-key MCP server: token estimates, JSON Schema conversion, MCP configs, tool search.

Changes · 3
CompareRegistry entry

4 tools: 3 change things and 1 only read.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http agenttoolbox https://agenttoolbox.net/api/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

4 tools

Changes things 3Claude Code: ask
  • convert_schemaConvert a JSON Schema into OpenAI, Anthropic and MCP tool definitions.No findings

    Why it is in this group

    • The name "convert_schema" says "convert": a word for a change.
    Description, as the server wrote it
    Convert a JSON Schema into OpenAI, Anthropic and MCP tool definitions.
  • estimate_tokensEstimate tokens and USD cost of a text across current frontier models (list prices verified 2026-10-21).No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Estimate tokens and USD cost of a text across current frontier models (list prices verified 2026-10-21).
  • mcp_configGenerate an mcpServers config block.No findings

    Why it is in this group

    • The description's first verb is "generate": a word for a change.
    • The input takes a statement or command to run (input.command), which can change anything it can reach.
    Description, as the server wrote it
    Generate an mcpServers config block.
Only reads 1Claude Code: allow
  • search_directorySearch the Agent Toolbox directory of AI agent tools.No findings

    Why it is in this group

    • The name "search_directory" says "search": a word for reading.
    Description, as the server wrote it
    Search the Agent Toolbox directory of AI agent tools.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http agenttoolbox https://agenttoolbox.net/api/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__agenttoolbox__search_directory"
    ],
    "ask": [
      "mcp__agenttoolbox__estimate_tokens",
      "mcp__agenttoolbox__convert_schema",
      "mcp__agenttoolbox__mcp_config"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as agenttoolbox. Review it before you use it.