update_source

A write tool on the Ludus Fast MCP server.

SERVERLudus FastMCP SOURCEtjnull/ludus-fastmcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/tjnull-ludus-fastmcp/update-source.md

WHAT IT DOES

What update_source does on Ludus FastMCP

AI agents use update_source to create or update resources in Ludus FastMCP, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ludus FastMCP environment.

RISK

Why update_source is rated Medium

Tool modifies source configurations in cyber range environment; uninformative description reduces confidence but update pattern indicates Write-class operation.

From the tool's definition uninformative description; update suggests reversible data modification in range management context

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs update_source safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Ludus FastMCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For update_source, this is the rule to start with:

update_source Rate-limited

update_source 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "update_source": {
      "limits": [
        {
          "counter": "update_source_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Ludus FastMCP, apply this rule, and every update_source call is checked against it from then on.

FAQ

Questions about update_source

What does the update_source tool do? +

update_source is a write tool on the Ludus Fast MCP server. It is categorised as a Write tool in the Ludus FastMCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_source? +

Register the Ludus Fast MCP server in PolicyLayer and add a rule for update_source: 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 Ludus FastMCP. Nothing to install.

What risk level is update_source? +

update_source is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit update_source? +

Yes. Add a rate_limit block to the update_source 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 update_source completely? +

Set action: deny in the PolicyLayer policy for update_source. 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 update_source? +

update_source is provided by the Ludus Fast MCP server (tjnull/ludus-fastmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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