chat_post · GTAV-CLAUDE- MCP: Risk & Policy

WHAT IT DOES

What chat_post does on GTAV-CLAUDE-MCP

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

WHY IT NEEDS A POLICY

Why chat_post needs a policy

This tool posts text to an in-game chat panel, which is a reversible write operation with no side effects on game state, memory, or external systems. The message can be deleted or overwritten. There is no financial impact, no code execution, no data destruction, and no permanent modification to game state.

From the tool's definition Tool name 'chat_post' and description 'Post a message to the in-game chat panel' indicate the tool creates/writes data (a message) to a game UI element.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

chat_post Rate-limited

chat_post 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": {
    "chat_post": {
      "limits": [
        {
          "counter": "chat_post_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 GTAV-CLAUDE-MCP, so you can run agents against it safely.

FAQ

Questions about chat_post

What does the chat_post tool do? +

Post a message to the in-game chat panel (Claude -> User). It is categorised as a Write tool in the GTAV-CLAUDE-MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on chat_post? +

Register the GTAV-CLAUDE- MCP server in PolicyLayer and add a rule for chat_post: 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 GTAV-CLAUDE-MCP. Nothing to install.

What risk level is chat_post? +

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

Can I rate-limit chat_post? +

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

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

chat_post is provided by the GTAV-CLAUDE- MCP server (tabbedscamper/gtav-claude-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.