disable_link · Yamcs MCP Server MCP: Risk & Policy

WHAT IT DOES

What disable_link does on Yamcs MCP Server

AI agents invoke disable_link to trigger actions in Yamcs MCP Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why disable_link needs a policy

Disabling a data link in a mission control system is an operational action that affects live system connectivity. It is not a simple data write, nor is it purely destructive (links can presumably be re-enabled), but it executes a state change on external infrastructure.

From the tool's definition 'Disable a data link' — disabling a link triggers an external operational change in a mission control system, affecting data flow between systems.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

disable_link Rate-limited

disable_link stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "disable_link": {
      "limits": [
        {
          "counter": "disable_link_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Yamcs MCP Server, so you can run agents against it safely.

FAQ

Questions about disable_link

What does the disable_link tool do? +

Disable a data link. It is categorised as a Execute tool in the Yamcs MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on disable_link? +

Register the Yamcs MCP Server MCP server in PolicyLayer and add a rule for disable_link: 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 Yamcs MCP Server. Nothing to install.

What risk level is disable_link? +

disable_link is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit disable_link? +

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

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

disable_link is provided by the Yamcs MCP Server MCP server (paulmramirez/yamcs-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.