google-workspace.chat_messages_create

Send a message to a Google Chat space

SERVERCoWork OS SOURCECoWork-OS/CoWork-OS

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/cowork-os/google-workspace.chat-messages-create.md

WHAT IT DOES

What google-workspace.chat_messages_create does on CoWork OS

AI agents use google-workspace.chat_messages_create to create or update resources in CoWork OS, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your CoWork OS environment.

RISK

Why google-workspace.chat_messages_create is rated Medium

This tool creates and sends a message to Google Chat, which is a reversible write operation. It modifies external service state (adds a message) but does not delete data, execute arbitrary code, move money, or have irreversible destructive effects.

From the tool's definition Tool name indicates 'create' action on 'chat_messages'; description states 'Send a message to a Google Chat space' which creates new message data in an external service.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs google-workspace.chat_messages_create safely

PolicyLayer is an MCP gateway: it sits between your AI agents and CoWork OS, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For google-workspace.chat_messages_create, this is the rule to start with:

google-workspace.chat_messages_create Rate-limited

google-workspace.chat_messages_create 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": {
    "google-workspace.chat_messages_create": {
      "limits": [
        {
          "counter": "google-workspace.chat_messages_create_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect CoWork OS, apply this rule, and every google-workspace.chat_messages_create call is checked against it from then on.

FAQ

Questions about google-workspace.chat_messages_create

What does the google-workspace.chat_messages_create tool do? +

Send a message to a Google Chat space. It is categorised as a Write tool in the CoWork OS MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on google-workspace.chat_messages_create? +

Register the CoWork OS MCP server in PolicyLayer and add a rule for google-workspace.chat_messages_create: 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 CoWork OS. Nothing to install.

What risk level is google-workspace.chat_messages_create? +

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

Can I rate-limit google-workspace.chat_messages_create? +

Yes. Add a rate_limit block to the google-workspace.chat_messages_create 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 google-workspace.chat_messages_create completely? +

Set action: deny in the PolicyLayer policy for google-workspace.chat_messages_create. 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 google-workspace.chat_messages_create? +

google-workspace.chat_messages_create is provided by the CoWork OS MCP server (CoWork-OS/CoWork-OS). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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