AI agents call get_screen to retrieve information from Mockit without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries existing screen mockup data and optionally its HTML representation. There are no creation, modification, deletion, execution, or financial operations involved. The tool is purely informational and returns data without any reversible or irreversible changes to the system state.
From the tool's definition Tool description states 'Get details and metadata for a specific screen' with optional HTML source retrieval. The verb 'Get' and the read-only nature of returning existing screen data indicates no data modification or side effects.
Attacks that exploit this kind of access
Get details and metadata for a specific screen. Set include_html=true to also return the HTML source. It is categorised as a Read tool in the Mockit MCP Server, which means it retrieves data without modifying state.
Register the Mockit MCP server in PolicyLayer and add a rule for get_screen: 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 Mockit. Nothing to install.
get_screen 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 get_screen 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 get_screen. 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.
get_screen is provided by the Mockit MCP server (karyaboyraz/mockit-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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