stop_recording · ChimeraX MCP Server MCP: Risk & Policy

WHAT IT DOES

What stop_recording does on ChimeraX MCP Server

AI agents use stop_recording to create or update resources in ChimeraX MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your ChimeraX MCP Server environment.

WHY IT NEEDS A POLICY

Why stop_recording needs a policy

This tool stops a recording session and writes/saves the output to a file. It creates a new file on disk, which is a reversible write operation. It does not execute arbitrary code, delete data, or involve financial transactions.

From the tool's definition Stop recording and save movie to file (.mp4, .webm, .mov, .avi)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

stop_recording Rate-limited

stop_recording 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": {
    "stop_recording": {
      "limits": [
        {
          "counter": "stop_recording_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about stop_recording

What does the stop_recording tool do? +

Stop recording and save movie to file (.mp4, .webm, .mov, .avi). It is categorised as a Write tool in the ChimeraX MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on stop_recording? +

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

What risk level is stop_recording? +

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

Can I rate-limit stop_recording? +

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

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

stop_recording is provided by the ChimeraX MCP Server MCP server (mahynotch/chimerax-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.