browser_observe_start

Start watching DOM mutations (childList, attributes, characterData).

SERVERTermux Browser Pilot SOURCEsalviz/termux-browser-pilot

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/salviz-termux-browser-pilot/browser-observe-start.md

WHAT IT DOES

What browser_observe_start does on Termux Browser Pilot

AI agents invoke browser_observe_start to trigger actions in Termux Browser Pilot. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why browser_observe_start is rated High

This tool initiates an active monitoring/observation process on the DOM in a live browser session. It triggers an ongoing external operation (mutation observer) that runs continuously and reacts to DOM changes. This goes beyond a simple read — it starts a persistent process with side effects (event listeners, callbacks, resource consumption).

From the tool's definition Start watching DOM mutations (childList, attributes, characterData)

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs browser_observe_start safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Termux Browser Pilot, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For browser_observe_start, this is the rule to start with:

browser_observe_start Rate-limited

browser_observe_start stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "browser_observe_start": {
      "limits": [
        {
          "counter": "browser_observe_start_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Termux Browser Pilot, apply this rule, and every browser_observe_start call is checked against it from then on.

FAQ

Questions about browser_observe_start

What does the browser_observe_start tool do? +

Start watching DOM mutations (childList, attributes, characterData). It is categorised as a Execute tool in the Termux Browser Pilot MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on browser_observe_start? +

Register the Termux Browser Pilot MCP server in PolicyLayer and add a rule for browser_observe_start: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Termux Browser Pilot. Nothing to install.

What risk level is browser_observe_start? +

browser_observe_start is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit browser_observe_start? +

Yes. Add a rate_limit block to the browser_observe_start rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block browser_observe_start completely? +

Set action: deny in the PolicyLayer policy for browser_observe_start. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides browser_observe_start? +

browser_observe_start is provided by the Termux Browser Pilot MCP server (salviz/termux-browser-pilot). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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