read_failed_patch

THE RISK

Low Risk

Why read_failed_patch needs a policy

This tool retrieves and queries diagnostic data (a failed Git patch) from the system without any side effects, modifications, or execution of code. It is purely informational, helping agents understand why a patch application failed. No data is modified, deleted, or executed.

From the tool's definition Tool name contains 'read' and description states 'Read the failed Git patch' - explicitly a retrieval operation with no modification or execution capability. Returns diagnostic information about a failed patch application.

Documented attack patterns abuse exactly the kind of access read_failed_patch gives an agent:

POLICY

How to control read_failed_patch

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 read_failed_patch:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "read_failed_patch": {}
  }
}

read_failed_patch is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Ktx — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Ktx tools

Destructive delete_integration_file Delete one allowed integration worktree file when the failed patch proves the deletion is Write record_verification_ledger Record the pre-write verification ledger required by loaded ingest skills. Call this befor Write write_integration_file Replace one allowed integration worktree file with repaired text content. Write write_repair_file Replace one allowed integration worktree file with repaired text content. Read echo_value Return the provided value as markdown. Read load_skill Load a skill to get specialized instructions. Call this when a skill listed in the system Read read_gate_error Read the artifact gate failure that must be repaired. Read read_integration_file Read one allowed file from the current integration worktree.

All 10 Ktx tools →

Read tools on other servers

M-Team MCP Server get_torrent_detail YouTube MCP Server search_channel Android Forensics ADB MCP Server parse_browser_history 0xarchive web3_challenge

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about read_failed_patch

What does the read_failed_patch tool do? +

Read the failed Git patch that could not be applied to the integration worktree. It is categorised as a Read tool in the Ktx MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on read_failed_patch? +

Register the Ktx MCP server in PolicyLayer and add a rule for read_failed_patch: 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.

What risk level is read_failed_patch? +

read_failed_patch is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit read_failed_patch? +

Yes. Add a rate_limit block to the read_failed_patch 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.

How do I block read_failed_patch completely? +

Set action: deny in the PolicyLayer policy for read_failed_patch. 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.

What MCP server provides read_failed_patch? +

read_failed_patch 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.

Enforce policy on every Ktx tool call.

Start from Ktx, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →