// SCAN REPORT

Ma Browser

7 tools. 3 can modify or destroy data without limits.

3 write tools that can modify data. Rate limits recommended.

Last updated: 2 Jul 2026

3 can modify or destroy data

4 read-only

7 tools total

Community server · catalogue entry verified 02/07/2026

How to control Ma Browser ↓

TOOL MAP

What Ma Browser exposes to your agents

Read (4) Write / Execute (3) Destructive / Financial (0)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

High Risk

The most dangerous Ma Browser tools

Execute · High site_run The tool executes site adapters which perform operations on real websites using the user's authenticated browser session. Write · Medium site_update Pulling or cloning repositories creates or modifies data (local repository state) in a reversible manner. Write · Medium browser_close_all Close tabs opened by ma-browser during the current MCP session

3 of Ma Browser's 7 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control Ma Browser

PolicyLayer is an MCP gateway — it sits between your AI agents and Ma Browser, and nothing reaches the server without passing your rules. These are the rules we recommend:

Rate limit write operations

{
  "browser_close_all": {
    "limits": [
      {
        "counter": "browser_close_all_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "site_info": {
    "limits": [
      {
        "counter": "site_info_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register Ma Browser — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON MA BROWSER →

Instant setup, no code required.

FULL CATALOGUE

All 7 Ma Browser tools

EXECUTE 1 tools

Execute site_run Run a site adapter and return its structured data

WRITE 2 tools

Write browser_close_all Close tabs opened by ma-browser during the current MCP session Write site_update Pull or clone the community adapter repository

READ 4 tools

Read site_info Get adapter metadata including args, example, and domain Read site_list List installed site adapters Read site_recommend Recommend adapters based on recent browsing history Read site_search Search installed site adapters by name, description, or domain. Pass domain to filter by the current page

EXPLORE

Related servers

Other MCP servers with similar tools — same risk classification, starter policies for each.

FAQ

Questions about Ma Browser

How do I prevent bulk modifications through Ma Browser? +

The Ma Browser server has 2 write tools including browser_close_all, site_update. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach Ma Browser.

How many tools does the Ma Browser MCP server expose? +

7 tools across 3 categories: Execute, Read, Write. 4 are read-only. 3 can modify, create, or delete data.

How do I enforce a policy on Ma Browser? +

Register the Ma Browser MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every Ma Browser tool call.

Deterministic rules across all 7 Ma Browser tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON MA BROWSER →

Instant setup, no code required.

7 Ma Browser tools catalogued and risk-classified — across an index of 43,000+ MCP servers.