Launch the speech UI. This will start the speech UI window that shows the microphone status and speech visualization. The UI is required for visual feedback during speech recognition. Returns: A message indicating whether the UI was successfully launched.
AI agents invoke launch_ui to trigger actions in Speech MCP. 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 executes an action that launches a UI window and initializes speech recognition infrastructure. While the operation itself is non-destructive and has limited blast radius (starting a UI window), it is not a read operation since it modifies system state by spawning a new process/window.
From the tool's definition Tool description states it will 'start the speech UI window' and 'launch' the UI, which are operations that trigger external visual components and initialize system processes.
Documented attack patterns abuse exactly the kind of access launch_ui gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Speech MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for launch_ui:
{
"version": "1",
"default": "deny",
"tools": {
"launch_ui": {
"limits": [
{
"counter": "launch_ui_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}launch_ui 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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Launch the speech UI. This will start the speech UI window that shows the microphone status and speech visualization. The UI is required for visual feedback during speech recognition. Returns: A message indicating whether the UI was successfully launched. It is categorised as a Execute tool in the Speech MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Speech MCP server in PolicyLayer and add a rule for launch_ui: 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 Speech MCP. Nothing to install.
launch_ui 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 launch_ui 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 launch_ui. 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.
launch_ui is provided by the Speech MCP server (kvadratni/speech-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Speech MCP, 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.
7 Speech MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.