Write content to a file in a Replit project. Creates parent directories if needed. Uses atomic write (temp file + rename) and verifies the write by reading back. For binary files (images, etc.), pass base64-encoded content with encoding
AI agents use replit_write_file to create or update resources in Apple Shortcuts — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Apple Shortcuts environment.
This tool creates or modifies files in a Replit project, which are reversible operations. It does not delete data (hence not Destructive) and does not execute code or trigger external operations based on arguments (hence not Execute).
From the tool's definition Tool description explicitly states 'Write content to a file' and 'Creates parent directories if needed'. The atomic write mechanism (temp file + rename) and verification read-back confirm file creation/modification capability.
Documented attack patterns abuse exactly the kind of access replit_write_file gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Apple Shortcuts, and nothing reaches the server without passing your rules. This is the rule we recommend for replit_write_file:
{
"version": "1",
"default": "deny",
"tools": {
"replit_write_file": {
"limits": [
{
"counter": "replit_write_file_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}replit_write_file 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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Write content to a file in a Replit project. Creates parent directories if needed. Uses atomic write (temp file + rename) and verifies the write by reading back. For binary files (images, etc.), pass base64-encoded content with encoding. It is categorised as a Write tool in the Apple Shortcuts MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Apple Shortcuts MCP server in PolicyLayer and add a rule for replit_write_file: 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 Apple Shortcuts. Nothing to install.
replit_write_file 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 replit_write_file 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 replit_write_file. 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.
replit_write_file is provided by the Apple Shortcuts MCP server (@mindstone/mcp-server-apple-shortcuts). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Apple Shortcuts, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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423 Apple Shortcuts tools catalogued and risk-classified — across an index of 43,000+ MCP servers.