generate_implementation_contract

WHAT IT DOES

What generate_implementation_contract does on Figma Spec

AI agents use generate_implementation_contract to create or update resources in Figma Spec — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Figma Spec environment.

WHY IT NEEDS A POLICY

Why generate_implementation_contract needs a policy

An AI agent can call generate_implementation_contract faster than any human can review — one bad instruction and it creates or modifies resources in Figma Spec by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_implementation_contract Rate-limited

generate_implementation_contract 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Figma Spec, so you can run agents against it safely.

FAQ

Questions about generate_implementation_contract

What does the generate_implementation_contract tool do? +

Analyzes a Figma frame or component subtree and produces an implementation contract with scope, assets, states, prototype interactions, dependencies, typography, colors, and acceptance criteria. It is categorised as a Write tool in the Figma Spec MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_implementation_contract? +

Register the Figma Spec MCP server in PolicyLayer and add a rule for generate_implementation_contract: 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 Spec. Nothing to install.

What risk level is generate_implementation_contract? +

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

Can I rate-limit generate_implementation_contract? +

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

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

generate_implementation_contract is provided by the Figma Spec MCP server (zaferdace/figma-spec-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.