screenshot_for_vision

Save a screenshot to a file (for later see_image / comparisons).

SERVERMcp Hands SOURCEhuocai250/mcp-hands

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mcp-hands/screenshot-for-vision.md

WHAT IT DOES

What screenshot_for_vision does on Mcp Hands

AI agents call screenshot_for_vision to retrieve information from Mcp Hands without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why screenshot_for_vision is rated Low

Even though screenshot_for_vision only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs screenshot_for_vision safely

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

screenshot_for_vision Allowed

screenshot_for_vision is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "screenshot_for_vision": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Hands, apply this rule, and every screenshot_for_vision call is checked against it from then on.

FAQ

Questions about screenshot_for_vision

What does the screenshot_for_vision tool do? +

Save a screenshot to a file (for later see_image / comparisons). It is categorised as a Read tool in the Mcp Hands MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on screenshot_for_vision? +

Register the Mcp Hands MCP server in PolicyLayer and add a rule for screenshot_for_vision: 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 Mcp Hands. Nothing to install.

What risk level is screenshot_for_vision? +

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

Can I rate-limit screenshot_for_vision? +

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

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

screenshot_for_vision is provided by the Mcp Hands MCP server (huocai250/mcp-hands). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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