AI agents call get_event_types to retrieve information from Ascom without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about event types without modifying, executing, or deleting any data. It is a pure read operation on the ASCOM Alpaca device's event system, presenting minimal risk even if called by an agent without constraints.
From the tool's definition The tool name 'get_event_types' and description 'Get available event types and descriptions' indicate a data retrieval operation with no side effects. It queries configuration or status information about available events.
Attacks that exploit this kind of access
Get available event types and descriptions. It is categorised as a Read tool in the Ascom MCP Server, which means it retrieves data without modifying state.
Register the Ascom MCP server in PolicyLayer and add a rule for get_event_types: 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 Ascom. Nothing to install.
get_event_types 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_event_types 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_event_types. 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_event_types is provided by the Ascom MCP server (stellarpunk/mcp-server-ascom). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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