gists_unstar

THE RISK

Medium Risk

Why gists_unstar needs a policy

Unstarring a gist removes a star/bookmark association but does not delete the gist itself. This is a reversible modification of user preference/relationship data (you can re-star it), making it a Write operation rather than Destructive. The blast radius is low as it only affects a star status.

From the tool's definition Unstar a gist

Documented attack patterns abuse exactly the kind of access gists_unstar gives an agent:

POLICY

How to control gists_unstar

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_unstar:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "gists_unstar": {
      "limits": [
        {
          "counter": "gists_unstar_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

gists_unstar stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register TypeSpec MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More TypeSpec MCP Server tools

Destructive deleteTodo Delete a todo Destructive gists_delete Delete a gist Execute build Build typespec mcp project Execute compile Compile the typespec project in the given directory. Execute call_endpoint Call the given endpoint.\nUse the Execute math_dot_product Computes the dot product of two vectors. Use this to find the scalar\nprojection of one ve Execute math_sub_vector Subtracts one vector from another. Use this to find the difference between\ntwo vectors. F Execute math_add_vector Adds two vectors together. Use this when you want to combine two vectors to\nget a resulta

All 28 TypeSpec MCP Server tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about gists_unstar

What does the gists_unstar tool do? +

Unstar a gist. It is categorised as a Write tool in the TypeSpec MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on gists_unstar? +

Register the TypeSpec MCP Server MCP server in PolicyLayer and add a rule for gists_unstar: 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.

What risk level is gists_unstar? +

gists_unstar is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit gists_unstar? +

Yes. Add a rate_limit block to the gists_unstar 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.

How do I block gists_unstar completely? +

Set action: deny in the PolicyLayer policy for gists_unstar. 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.

What MCP server provides gists_unstar? +

gists_unstar 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.

Enforce policy on every TypeSpec MCP Server tool call.

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.

CHECK YOUR STACK →