Restore a file to a specific point in its local history
AI agents use restore_from_history to create or update resources in Local History MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Local History MCP Server environment.
The restore operation writes/modifies file data on disk. While reversible (unlike Destructive actions), it directly changes active files and could corrupt work or introduce unintended code if misused by an AI agent without proper validation. The severity is high due to the potential to overwrite user code/data, but not critical since the operation can be undone via undo history or another restore call.
From the tool's definition Tool description states 'Restore a file to a specific point in its local history' — this modifies file content by overwriting the current version with a historical snapshot.
Documented attack patterns abuse exactly the kind of access restore_from_history gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Local History MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for restore_from_history:
{
"version": "1",
"default": "deny",
"tools": {
"restore_from_history": {
"limits": [
{
"counter": "restore_from_history_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}restore_from_history 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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Restore a file to a specific point in its local history. It is categorised as a Write tool in the Local History MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Local History MCP Server MCP server in PolicyLayer and add a rule for restore_from_history: 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 Local History MCP Server. Nothing to install.
restore_from_history 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 restore_from_history 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 restore_from_history. 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.
restore_from_history is provided by the Local History MCP Server MCP server (xxczaki/local-history-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Local History MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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6 Local History MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.