vision.capture_state
Return one actually observed state and its exact screenshot citations.
This record as markdown: /tools/visionmcp/vision.capture-state.md
What vision.capture_state does on Visionmcp
AI agents call vision.capture_state to retrieve information from Visionmcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why vision.capture_state is rated Low
This tool performs a read-only operation: it captures and returns current visual state information and screenshot references without creating, modifying, deleting, or executing anything. The action is passive observation only, making it a Read category risk with low severity since misuse would only expose information already visible on screen.
From the tool's definition Tool description states it 'Return[s] one actually observed state and its exact screenshot citations' — purely retrieves/queries visual state data with no modification or side effects.
Attacks that exploit this kind of access
The rule that runs vision.capture_state safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Visionmcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For vision.capture_state, this is the rule to start with:
vision.capture_state is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Visionmcp, apply this rule, and every vision.capture_state call is checked against it from then on.
Questions about vision.capture_state
Return one actually observed state and its exact screenshot citations. It is categorised as a Read tool in the Visionmcp MCP Server, which means it retrieves data without modifying state.
Register the Vision MCP server in PolicyLayer and add a rule for vision.capture_state: 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 Visionmcp. Nothing to install.
vision.capture_state 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 vision.capture_state 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 vision.capture_state. 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.
vision.capture_state is provided by the Vision MCP server (joshuahickscorp/visionmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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