Returns resolved display capabilities for a display, including effective network mode plus concrete browser/runtime facts such as screen, viewport, touch/input hints, browser and engine version, platform classification, feature support, known limitations, graphics hints, and a recommended deliver...
Risk signalsHandles credentials or secrets (access_token)
Part of the Agentview server.
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AI agents call get_display_capabilities to retrieve information from Agentview without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though get_display_capabilities only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"get_display_capabilities": {}
}
}See the full Agentview policy for all 55 tools.
These attack patterns abuse exactly the kind of access get_display_capabilities gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Returns resolved display capabilities for a display, including effective network mode plus concrete browser/runtime facts such as screen, viewport, touch/input hints, browser and engine version, platform classification, feature support, known limitations, graphics hints, and a recommended delivery mode. Call this before generating or sending HTML so your agent can match the content to the real display browser. Requires authentication with at least content_only scope.. It is categorised as a Read tool in the Agentview MCP Server, which means it retrieves data without modifying state.
Register the Agentview MCP server in PolicyLayer and add a rule for get_display_capabilities: 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 Agentview. Nothing to install.
get_display_capabilities 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_display_capabilities 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_display_capabilities. 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_display_capabilities is provided by the Agentview MCP server (rafaelkocurek-nvob/agentview). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 55 Agentview tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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