AI agents call gists_list_starred to retrieve information from TypeSpec MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and displays a list of starred gists belonging to the authenticated user. It performs no modifications, deletions, or external actions; it only reads and returns data. This is a classic Read category tool with minimal security risk.
From the tool's definition Tool name is 'gists_list_starred' and description states 'List starred gists' — a pure query/retrieval operation with no side effects.
Documented attack patterns abuse exactly the kind of access gists_list_starred gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and TypeSpec MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for gists_list_starred:
{
"version": "1",
"default": "deny",
"tools": {
"gists_list_starred": {}
}
} gists_list_starred is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List starred gists. It is categorised as a Read tool in the TypeSpec MCP Server MCP Server, which means it retrieves data without modifying state.
Register the TypeSpec MCP Server MCP server in PolicyLayer and add a rule for gists_list_starred: 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 TypeSpec MCP Server. Nothing to install.
gists_list_starred 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 gists_list_starred 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 gists_list_starred. 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.
gists_list_starred is provided by the TypeSpec MCP Server MCP server (microsoft/typespec-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from TypeSpec MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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28 TypeSpec MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.