AI agents call computer_screen_info to retrieve information from LocalAnt without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool purely retrieves display resolution information for coordinate mapping purposes. It performs a read-only query of system display properties, causing no modifications, deletions, code execution, or financial impact. The low severity reflects the minimal risk: knowing screen resolution does not enable malicious actions on its own and is informational only.
From the tool's definition Tool name 'computer_screen_info' and description 'Get the logical resolution of the main display' indicates a query operation that retrieves display metadata with no side effects.
Attacks that exploit this kind of access
Get the logical resolution of the main display (the coordinate space for computer_* tools). It is categorised as a Read tool in the LocalAnt MCP Server, which means it retrieves data without modifying state.
Register the LocalAnt MCP server in PolicyLayer and add a rule for computer_screen_info: 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 LocalAnt. Nothing to install.
computer_screen_info is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the computer_screen_info 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.
Set action: deny in the PolicyLayer policy for computer_screen_info. 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.
computer_screen_info is provided by the LocalAnt MCP server (yuga-hashimoto/localant). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
computer_screen_info is one line of LocalAnt's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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