AI agents use generate_icon_set to create or update resources in Xcode — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Xcode environment.
This tool creates or generates new image assets (icon set) from a source image, which modifies the project structure by adding new files. This is a reversible write operation—the generated icons can be deleted or replaced. It does not execute arbitrary code, delete existing data irreversibly, or move money.
From the tool's definition The tool name 'generate_icon_set' and description 'Generate an app icon set from a source image' indicates creation of new asset files in the Xcode project.
Documented attack patterns abuse exactly the kind of access generate_icon_set gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Xcode, and nothing reaches the server without passing your rules. This is the rule we recommend for generate_icon_set:
{
"version": "1",
"default": "deny",
"tools": {
"generate_icon_set": {
"limits": [
{
"counter": "generate_icon_set_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}generate_icon_set 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.
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Generate an app icon set from a source image. It is categorised as a Write tool in the Xcode MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Xcode MCP server in PolicyLayer and add a rule for generate_icon_set: 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 Xcode. Nothing to install.
generate_icon_set is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the generate_icon_set 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 generate_icon_set. 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.
generate_icon_set is provided by the Xcode MCP server (xcode-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 69 Xcode tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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69 Xcode tools catalogued and risk-classified — across an index of 42,500+ MCP servers.