read_thread

Reconstruct a bounded conversation from message headers without modifying the mailbox.

SERVERMcp Control Plane SOURCEalbertik322-sudo/mcp-control-plane

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mcp-control-plane/read-thread.md

WHAT IT DOES

What read_thread does on Mcp Control Plane

AI agents call read_thread to retrieve information from Mcp Control Plane without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why read_thread is rated Low

This tool retrieves and queries email message headers to reconstruct conversation threads. The explicit statement that it operates 'without modifying the mailbox' confirms no write, delete, or execute operations occur. It is purely informational retrieval with no side effects, making it a Read category tool with low severity since it only accesses existing message metadata without altering state.

From the tool's definition Tool reconstructs a conversation 'without modifying the mailbox' and reads message headers to reconstruct bounded conversation thread.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs read_thread safely

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

read_thread Allowed

read_thread is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Control Plane, apply this rule, and every read_thread call is checked against it from then on.

FAQ

Questions about read_thread

What does the read_thread tool do? +

Reconstruct a bounded conversation from message headers without modifying the mailbox. It is categorised as a Read tool in the Mcp Control Plane MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on read_thread? +

Register the Mcp Control Plane MCP server in PolicyLayer and add a rule for read_thread: 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 Mcp Control Plane. Nothing to install.

What risk level is read_thread? +

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

Can I rate-limit read_thread? +

Yes. Add a rate_limit block to the read_thread 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_thread completely? +

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

read_thread is provided by the Mcp Control Plane MCP server (albertik322-sudo/mcp-control-plane). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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