private_thinking_start · Claude Imagine MCP: Risk & Policy

WHAT IT DOES

What private_thinking_start does on Claude Imagine

AI agents invoke private_thinking_start to trigger actions in Claude Imagine. 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 private_thinking_start needs a policy

private_thinking_start triggers real processes with real consequences. An agent gone sideways doesn't fire it once — it starts dozens of builds, sends mass notifications, or burns through compute before anyone looks up.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

private_thinking_start Rate-limited

private_thinking_start 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": {
    "private_thinking_start": {
      "limits": [
        {
          "counter": "private_thinking_start_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 Claude Imagine, so you can run agents against it safely.

FAQ

Questions about private_thinking_start

What does the private_thinking_start tool do? +

Show the thinking bubble. It is categorised as a Execute tool in the Claude Imagine MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on private_thinking_start? +

Register the Claude Imagine MCP server in PolicyLayer and add a rule for private_thinking_start: 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 Claude Imagine. Nothing to install.

What risk level is private_thinking_start? +

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

Can I rate-limit private_thinking_start? +

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

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

private_thinking_start is provided by the Claude Imagine MCP server (t3rm1nu55/claudeimagine). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.