Launch an application on the Classic Mac by path or creator code. Creator codes are 4-character identifiers (e.g. 'ttxt' for SimpleText, 'WILD' for HyperCard). Requires AgentBridge.
Risk signalsAccepts file system path (path)
Part of the Classic Mac server.
Free to start. No card required.
AI agents invoke classic_mac_launch_app to trigger processes or run actions in Classic Mac. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
classic_mac_launch_app can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"classic_mac_launch_app": {
"limits": [
{
"counter": "classic_mac_launch_app_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Classic Mac policy for all 23 tools.
These attack patterns abuse exactly the kind of access classic_mac_launch_app gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Launch an application on the Classic Mac by path or creator code. Creator codes are 4-character identifiers (e.g. 'ttxt' for SimpleText, 'WILD' for HyperCard). Requires AgentBridge.. It is categorised as a Execute tool in the Classic Mac MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Classic Mac MCP server in PolicyLayer and add a rule for classic_mac_launch_app: 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 Classic Mac. Nothing to install.
classic_mac_launch_app 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 classic_mac_launch_app 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 classic_mac_launch_app. 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.
classic_mac_launch_app is provided by the Classic Mac MCP server (classic-mac-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 23 Classic Mac tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.