Agent Guard

Name: Agent Guard
Author: mdfifty50-boop

by mdfifty50-boopversion 0.1.3i★ –iRuns on your computer

Registry nameio.github.mdfifty50-boop/agent-guard

Install

Overview

Description from the maker (original English)

Constitutional guardrails and loop detection for AI agents

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "agent-guard": {
      "command": "npx",
      "args": [
        "-y",
        "agent-guard-mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add agent-guard -- npx -y agent-guard-mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "agent-guard": {
      "command": "npx",
      "args": [
        "-y",
        "agent-guard-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "agent-guard": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "agent-guard-mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account mdfifty50-boop, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 18398 servers in this category
Published to the registry more recently than 6% of the other 18398 servers in this category
Basic checks equal to or better than 100% of the other 18398 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Agent Guard safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.3) reached the registry 7 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Tethered Trust

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Spec Driven Development

by formulahendry

MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.

Runs on your computer★ 440MITUpdated 14 months ago

Install

Remote Desktop Commander

by desktop-commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

Runs in the cloud★ 211Updated 3 days ago

Install

Tethered Trust

by tetheredtrust.com

Fit, compatibility and recall checks for AI agents before they buy: verdicts, evidence, receipts.

Runs in the cloudUpdated today

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

agent-guard-mcp

MCP server that detects and prevents infinite agent loops — the #1 reliability problem in agentic systems.

Provides circuit breakers, pattern detection, stuck-agent analysis, and recovery recommendations via the Model Context Protocol.

Install

npx agent-guard-mcp

Claude Desktop

Add to claude_desktop_config.json:

"mcpServers": { "agent-guard": { "command": "npx", "args": ["agent-guard-mcp"] } } }

From source

git clone https://github.com/mdfifty50-boop/agent-guard-mcp.git

cd agent-guard-mcp npm install node src/index.js

Tools

register_agent

Param	Type	Default	Description
`agent_id`	string	required	Unique agent identifier
`max_iterations`	number	100	Max iterations before forced stop
`progress_threshold`	number	0.3	Min unique/total action ratio to be "making progress"

log_action

Log an agent action for loop detection. Maintains a rolling window of the last 50 actions.

Param	Type	Default	Description
`agent_id`	string	required	Agent identifier
`tool_name`	string	required	Tool being called
`args`	object	required	Arguments passed
`result_preview`	string	`""`	Brief result preview (max 200 chars)

Returns early warnings when repeated patterns are detected.

detect_loop

Check if an agent is stuck in an infinite loop.

Param	Type	Description
`agent_id`	string	Agent to check

Returns:

is_stuck — boolean
confidence — 0.0 to 1.0
pattern — healthy, exact_repeat, low_diversity, or exact_repeat_and_low_diversity
suggestion — human-readable recovery advice
repeated_actions — list of repeated signatures with counts

set_circuit_breaker

Configure automatic intervention when action patterns repeat.

Param	Type	Default	Description
`agent_id`	string	required	Agent identifier
`max_repeats`	number	3	Trigger after N identical actions
`action`	string	`"warn"`	`"warn"`, `"block"`, or `"suggest_alternative"`

check_circuit_breaker

Pre-flight check before executing a tool. Call this BEFORE the actual tool call.

Param	Type	Description
`agent_id`	string	Agent identifier
`proposed_tool`	string	Tool about to be called
`proposed_args`	object	Arguments about to be passed

Returns proceed: false when the circuit breaker fires (block mode only).

get_stuck_report

Detailed analysis of why an agent is stuck.

Param	Type	Description
`agent_id`	string	Agent to analyze

Returns: action history, pattern analysis, token waste estimate, diversity ratio, top repeated patterns, and recovery recommendations.

get_health_dashboard

Overview of all monitored agents. No parameters.

Returns all agents sorted by risk score with their status (STUCK/HEALTHY), action counts, and circuit breaker config.

Resources

URI	Description
`agent-guard://agents`	All monitored agents with current status

Usage Pattern

1. register_agent — at agent startup

Before each tool call: a. check_circuit_breaker — should this action proceed? b. Execute the tool c. log_action — record what happened
Periodically:

detect_loop — am I stuck?
get_health_dashboard — how are all agents doing?

On stuck detection:

get_stuck_report — what went wrong and how to recover

Tests

npm test

License

MIT

Agent Guard

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Tethered Trust

README from the maker

agent-guard-mcp

Install

Claude Desktop

From source

Tools

register_agent

log_action

detect_loop

set_circuit_breaker

check_circuit_breaker

get_stuck_report

get_health_dashboard

Resources

Usage Pattern

Tests

License