Cast a Canvas surface to a Chromecast/Android TV device. No pairing required. Use canvas_server_url and surface_id from the canvas_create or canvas_show result.
AI agents invoke atv_cast_url to trigger actions in AndroidTVMCP. 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 triggers an external operation — casting media/content to a remote device. It initiates a network-based action with real-world side effects (changing what is displayed on the TV), making it Execute. It does not delete data (not Destructive) nor involve financial transactions. Severity is medium as misuse could push unwanted content to a user's TV device.
From the tool's definition Cast a Canvas surface to a Chromecast/Android TV device... Use canvas_server_url and surface_id from the canvas_create or canvas_show result.
Documented attack patterns abuse exactly the kind of access atv_cast_url gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and AndroidTVMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for atv_cast_url:
{
"version": "1",
"default": "deny",
"tools": {
"atv_cast_url": {
"limits": [
{
"counter": "atv_cast_url_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}atv_cast_url 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.
Free to start. No card required.
Cast a Canvas surface to a Chromecast/Android TV device. No pairing required. Use canvas_server_url and surface_id from the canvas_create or canvas_show result. It is categorised as a Execute tool in the AndroidTVMCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the AndroidTV MCP server in PolicyLayer and add a rule for atv_cast_url: 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 AndroidTVMCP. Nothing to install.
atv_cast_url 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 atv_cast_url 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 atv_cast_url. 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.
atv_cast_url is provided by the AndroidTV MCP server (pigeek/androidtvmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from AndroidTVMCP, 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.
17 AndroidTVMCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.