MCP MeasureMCP Measure

index observed

ActionGuard Protocol Inspector Agent

Diff and poisoning detection for MCP servers: catch schema drift and prompt poisoning.

Should I use this

Quality & Safety

A
Description quality
90%
Schema completeness
100%
Naming quality
80%
Poisoning risk
100%
Permission match
100%
Protocol compliance
100%

Based on automated analysis of tool definitions and protocol compliance.

Context Cost

~181Tokens (tool definitions)
~572 BTypical response size
Minimal attention impact (0.14% of 128k context)

This is the approximate number of tokens consumed each time the server's tools are loaded into a model's context. Higher counts reduce the attention available for other tasks.

Install

One-Click Install

Add this to your `claude_desktop_config.json` file:

{
  "mcpServers": {
    "actionguard": {
      "url": "https://actionguard.ai/mcp"
    }
  }
}

Remote endpoints

https://actionguard.ai/mcpstreamable-http

What it can do

Tool inventory

Tools (2)

🟢 Read-only🟡 Write🔴 Delete⚪ Unknown
🟢actionguard_inspect(url)

Run a 5-stage continuous reliability, security, and schema audit of an MCP server or AI agent endpoint.

Input Schema

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The target MCP server or agent endpoint URL to audit"
    }
  },
  "required": [
    "url"
  ]
}
🟢actionguard_check_drift(url, pinnedSchemaHash)

Verify whether an MCP server's tools schema or descriptions have drifted from a pinned Dual-Hash.

Input Schema

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "description": "The target MCP server endpoint URL"
    },
    "pinnedSchemaHash": {
      "type": "string",
      "description": "Pinned 64-char hex SHA-256 schema hash"
    }
  },
  "required": [
    "url",
    "pinnedSchemaHash"
  ]
}

Community

Rate this Server

Evidence

Recent observations

verifiedversion not recorded2 tools