Bulk rename files in a directory using pattern matching
AI agents use bulk_rename_files to create or update resources in Mcp Windows — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Windows environment.
The tool modifies file names in bulk, which is a write operation that changes data but remains reversible (files can be renamed back). It does not delete files (would be Destructive) or execute arbitrary code (would be Execute). The 'bulk' aspect and pattern matching capability increase severity to medium due to potential for widespread unintended modifications if patterns match incorrectly.
From the tool's definition Tool name 'bulk_rename_files' and description 'Bulk rename files in a directory using pattern matching' indicate creation/modification of file metadata. Renaming is a reversible write operation.
Risk signalsBulk/mass operation — affects multiple targets
Documented attack patterns abuse exactly the kind of access bulk_rename_files gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Windows, and nothing reaches the server without passing your rules. This is the rule we recommend for bulk_rename_files:
{
"version": "1",
"default": "deny",
"tools": {
"bulk_rename_files": {
"limits": [
{
"counter": "bulk_rename_files_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}bulk_rename_files 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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Bulk rename files in a directory using pattern matching. It is categorised as a Write tool in the Mcp Windows MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mcp Windows MCP server in PolicyLayer and add a rule for bulk_rename_files: 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 Mcp Windows. Nothing to install.
bulk_rename_files 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 bulk_rename_files 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 bulk_rename_files. 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.
bulk_rename_files is provided by the Mcp Windows MCP server (mukul975/mcp-windows-automation). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 441 Mcp Windows tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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441 Mcp Windows tools catalogued and risk-classified — across an index of 42,500+ MCP servers.