whatsmcp

Create Group

wa_create_group

Create a WhatsApp group with a name and initial members from one of your accounts. Returns the new group's JID (use it as wa_send_message's 'to') and an invite link.

Input Schema

TableJSON Schema

Name	Required	Description
`name`	Yes	the group name (max 25 characters)
`members`	No	initial members — phone numbers (E.164) or JIDs, comma- or space-separated; do NOT include your own number
`account_id`	Yes	the account to create the group from, as returned by wa_list_accounts

Output Schema

TableJSON Schema

Name	Required	Description
`items`	No	the rows of a list operation
`status`	Yes	ok (the operation succeeded) or refused (see refusal; for wa_update_group, applied lists the changes that took effect before it)
`applied`	No	wa_update_group only: the settings that were changed, in order — on a refusal, the ones that took effect before it
`refusal`	No	present only when status is refused
`summary`	No	a human-readable result
`group_jid`	No	the new group's JID (wa_create_group only) — use it as wa_send_message's 'to'
`invite_link`	No	the group's invite link (wa_create_group or wa_get_group_invite_link)

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedOct 14, 2026

addedOutput schema / properties / refusal / properties / account_status

Added value: +{
+  "description": "when the number is not working: its status — starting, not_running, whatsapp_down, suspended, pairing, unlinked or locked",
+  "type": "string"
+}

addedOutput schema / properties / refusal / properties / account_status_reason

Added value: +{
+  "description": "the detail of account_status, e.g. no_egress, stopped, no_plan",
+  "type": "string"
+}

addedOutput schema / properties / refusal / properties / since

Added value: +{
+  "description": "when the number stopped working, RFC3339, when known",
+  "type": "string"
+}

First observedSep 27, 2026

TDQS

A3.8/5.0

Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare the operation is not read-only, not idempotent, and not destructive. The description adds that it returns a JID and invite link, which is mildly useful context, but says nothing about permissions, rate limits, or failure behavior, so it adds limited value beyond structured fields.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two tight sentences with no waste, front-loading the core action and then the output usefulness. Every clause earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With annotations covering safety and an output schema present, the return values need not be explained, yet the description usefully ties the JID to wa_send_message. It is nearly complete for this tool, with only minor gaps in usage guidance.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents name, members, and account_id fully. The description restates the fields at a high level ('a name and initial members') but adds no syntax or format detail beyond the schema, so the baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description gives a precise verb (Create) and resource (WhatsApp group) with scope ('from one of your accounts') and the fields involved (name, initial members). It clearly distinguishes itself from siblings like wa_update_group, wa_join_group, and wa_delete_group.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It implicitly indicates when to use it (to make a new group), and helpfully notes the returned JID is used as wa_send_message's 'to'. But it offers no explicit when-not guidance or comparison to alternatives such as wa_join_group for entering an existing group.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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