wa_group_update_subject

Change the name/subject of a WhatsApp group.

SERVERWA MCP SOURCEdelltrak/wamcp

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/delltrak-wamcp/wa-group-update-subject.md

WHAT IT DOES

What wa_group_update_subject does on WA MCP

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

RISK

Why wa_group_update_subject is rated Medium

This tool modifies group metadata (the subject/name) but does not delete data or execute arbitrary code. The change is reversible: a group subject can be changed back. It affects only the group's naming property, making it a Write operation. Severity is medium because misuse could cause group confusion or social engineering within group contexts, but the impact is limited to metadata and easily corrected.

From the tool's definition Tool name indicates 'update_subject' and description states 'Change the name/subject of a WhatsApp group' — a reversible modification operation.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs wa_group_update_subject safely

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

wa_group_update_subject Rate-limited

wa_group_update_subject 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": {
    "wa_group_update_subject": {
      "limits": [
        {
          "counter": "wa_group_update_subject_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 WA MCP, apply this rule, and every wa_group_update_subject call is checked against it from then on.

FAQ

Questions about wa_group_update_subject

What does the wa_group_update_subject tool do? +

Change the name/subject of a WhatsApp group. It is categorised as a Write tool in the WA 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 wa_group_update_subject? +

Register the WA MCP server in PolicyLayer and add a rule for wa_group_update_subject: 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 WA MCP. Nothing to install.

What risk level is wa_group_update_subject? +

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

Can I rate-limit wa_group_update_subject? +

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

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

wa_group_update_subject is provided by the WA MCP server (delltrak/wamcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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