get_reactions

THE RISK

Low Risk

Why get_reactions needs a policy

This tool retrieves reaction data from Figma design nodes without creating, modifying, deleting, or executing any operations. It is a simple query/fetch operation with minimal blast radius if misused by an AI agent—at worst, it exposes design metadata that is typically intended to be readable.

From the tool's definition Tool name 'get_reactions' and description 'Get Figma Prototyping Reactions from multiple nodes' indicate a read-only retrieval operation with no modification or side effects.

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

POLICY

How to control get_reactions

PolicyLayer is an MCP gateway — it sits between your AI agents and Figma AI Bridge, and nothing reaches the server without passing your rules. This is the rule we recommend for get_reactions:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_reactions": {}
  }
}

get_reactions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

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

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_reactions

What does the get_reactions tool do? +

Get Figma Prototyping Reactions from multiple nodes. CRITICAL: The output MUST be processed using the. It is categorised as a Read tool in the Figma AI Bridge MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_reactions? +

Register the Figma AI Bridge MCP server in PolicyLayer and add a rule for get_reactions: 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 Figma AI Bridge. Nothing to install.

What risk level is get_reactions? +

get_reactions is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_reactions? +

Yes. Add a rate_limit block to the get_reactions 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 get_reactions completely? +

Set action: deny in the PolicyLayer policy for get_reactions. 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 get_reactions? +

get_reactions is provided by the Figma AI Bridge MCP server (renfei-design/figma_ai_bridge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Figma AI Bridge tool call.

Start from Figma AI Bridge, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →