mcpcost

io.github.LuminariSoftwares/tool-guardian

Tool Guardian

Is the Tool Guardian MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-08.

Too many MCP servers eating your context? A router that loads each tool's schema only when needed.

alive probed 2026-11-15 · unchanged since 2026-11-08

6tools
1.1ktokens in Claude Opus 5.5
0.5 %of Claude's 200k window
0.4×the median server
456 msto initialize
4 msto list tools
Run it
uvx tool-guardian@0.10.1 (stdio, probed in a container with the network off)
Host
pypi.org
Reports itself as
tool-guardian 0.10.1
Capabilities
tools
Instructions
none
Of a 1M window
0.1 % of a 1M context window
Count
1.1k tokens in Claude Opus 5.5, exact, measured 2026-10-31. With the Claude Code prefix mcp__…__ on each tool name: 1.1k. The o200k_base estimate is 609. Counted again when the tool definitions change. Method.
Repository
https://github.com/LuminariSoftwares/tool-guardian
Registry
active, updated 2026-11-07 · registry entry
Changes
3 recorded, reachable in 3 of them. A row is added when the result, the tool count or the cost changes.

Most expensive tools

The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.74×.

Tool≈ Claude tokenso200k estimateShare of this server
retrieve_spill25614724 %
search_capabilities20411719 %
call_tool19511218 %
describe_tool1699716 %
list_capabilities1398013 %

Compare this server with others.

More servers

Other registry entries on pypi.org, the ones next to this name; all of them.

Servers that mention guardian.

History

We add a row when the result changes. A server with no change keeps its last row.

ProbedResultInitToolsClaudeo200k
2026-10-31 07:35alive359 ms61.1k609
2026-10-24 06:32alive557 ms6609
2026-10-17 06:16alive456 ms6932516

Badge for the README

mcpcost: alive

The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.

Atom feed

A mail when this server changes

Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.

For the publisher