Capture and analyze screenshot.
AI agents invoke capture_and_analyze to trigger actions in Wayland. 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.
This tool performs two operations: capturing a screenshot (Read) and analyzing it (Execute/compute). While screenshot capture alone is Read, the analysis component implies processing/computation. Given the server context with mouse/keyboard control tools, misuse could facilitate surveillance or automation of user sessions.
From the tool's definition 'Capture and analyze screenshot' — combines screen capture (read) with analysis (execute/compute); part of a server providing 'mouse and keyboard control tools' suggesting active desktop interaction capabilities
Documented attack patterns abuse exactly the kind of access capture_and_analyze gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Wayland, and nothing reaches the server without passing your rules. This is the rule we recommend for capture_and_analyze:
{
"version": "1",
"default": "deny",
"tools": {
"capture_and_analyze": {
"limits": [
{
"counter": "capture_and_analyze_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}capture_and_analyze 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.
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Capture and analyze screenshot. It is categorised as a Execute tool in the Wayland MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Wayland MCP server in PolicyLayer and add a rule for capture_and_analyze: 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 Wayland. Nothing to install.
capture_and_analyze is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the capture_and_analyze 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 capture_and_analyze. 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.
capture_and_analyze is provided by the Wayland MCP server (someaka/wayland-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Wayland, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
9 Wayland tools catalogued and risk-classified — across an index of 43,000+ MCP servers.