browser_resize · Awslabs Valkey MCP: Risk & Policy

WHAT IT DOES

What browser_resize does on Awslabs Valkey

AI agents call browser_resize as a supporting operation in Awslabs Valkey workflows.

WHY IT NEEDS A POLICY

Why browser_resize needs a policy

The description is empty and the tool name alone ('browser_resize') suggests a UI/viewport resizing action with no obvious data read/write/execute semantics in the context of a Valkey/ElastiCache MCP server. Without any description, classification is highly uncertain.

From the tool's definition Tool name is 'browser_resize' but description is empty; no information about what it does

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

browser_resize Rate-limited

browser_resize gets a rate cap, and everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "browser_resize": {
      "limits": [
        {
          "counter": "browser_resize_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

SET A RULE FOR THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Awslabs Valkey, so you can run agents against it safely.

FAQ

Questions about browser_resize

What does the browser_resize tool do? +

browser_resize. It is categorised as a Other tool in the Awslabs Valkey MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on browser_resize? +

Register the Awslabs Valkey MCP server in PolicyLayer and add a rule for browser_resize: 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 Awslabs Valkey. Nothing to install.

What risk level is browser_resize? +

browser_resize is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit browser_resize? +

Yes. Add a rate_limit block to the browser_resize 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_resize completely? +

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

browser_resize is provided by the Awslabs Valkey MCP server (awslabs.valkey-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.