Replace one allowed integration worktree file with repaired text content.
AI agents use write_repair_file to create or update resources in Ktx — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ktx environment.
This tool modifies file content reversibly within an allowed scope. It is Write rather than Destructive because: (1) it explicitly replaces content with 'repaired' versions (implying intentional correction, not erasure), (2) the 'allowed' constraint suggests governance, and (3) it operates on a single file at a time.
From the tool's definition Tool description states it will 'Replace one allowed integration worktree file with repaired text content.' The verb 'Replace' indicates modification of existing data.
Documented attack patterns abuse exactly the kind of access write_repair_file gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ktx, and nothing reaches the server without passing your rules. This is the rule we recommend for write_repair_file:
{
"version": "1",
"default": "deny",
"tools": {
"write_repair_file": {
"limits": [
{
"counter": "write_repair_file_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}write_repair_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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Replace one allowed integration worktree file with repaired text content. It is categorised as a Write tool in the Ktx MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Ktx MCP server in PolicyLayer and add a rule for write_repair_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 Ktx. Nothing to install.
write_repair_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 write_repair_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 write_repair_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.
write_repair_file is provided by the Ktx MCP server (kaelio/ktx). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Ktx, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
10 Ktx tools catalogued and risk-classified — across an index of 43,000+ MCP servers.