navigate_page

Navigate to a web page

SERVERNcp SOURCE@portel/ncp

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/io-github-portel-dev-ncp/navigate-page.md

WHAT IT DOES

What navigate_page does on Ncp

AI agents invoke navigate_page to trigger actions in Ncp. 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 navigate_page is rated High

Navigation to arbitrary web pages can trigger code execution on those pages, load malicious content, or cause unintended side effects. While not destructive or financial by itself, it is an Execute action because it performs an external operation beyond simple data retrieval.

From the tool's definition Tool description states 'Navigate to a web page', which triggers browser navigation—an external operation whose effects depend on the target argument (URL).

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs navigate_page safely

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

navigate_page Rate-limited

navigate_page 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": {
    "navigate_page": {
      "limits": [
        {
          "counter": "navigate_page_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 Ncp, apply this rule, and every navigate_page call is checked against it from then on.

FAQ

Questions about navigate_page

What does the navigate_page tool do? +

Navigate to a web page. It is categorised as a Execute tool in the Ncp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on navigate_page? +

Register the Ncp MCP server in PolicyLayer and add a rule for navigate_page: 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 Ncp. Nothing to install.

What risk level is navigate_page? +

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

Can I rate-limit navigate_page? +

Yes. Add a rate_limit block to the navigate_page 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 navigate_page completely? +

Set action: deny in the PolicyLayer policy for navigate_page. 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 navigate_page? +

navigate_page is provided by the Ncp MCP server (@portel/ncp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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