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wati-io

WhatsApp MCP Server

by wati-io

send_interactive

Send interactive WhatsApp messages with buttons or a list. Choose button or list format for richer customer interactions.

Instructions

Send an interactive WhatsApp message with buttons or a list.

Args:
    target: Recipient phone number with country code, no + (e.g. "85264318721")
    interactive_type: Either "buttons" or "list"
    body_text: Main message body text
    buttons: For type="buttons": list of {"text": "Button label"} (max 3)
    header_text: Optional header text
    footer_text: Optional footer text
    button_text: For type="list": text shown on the list button
    sections: For type="list": list of {"title": "...", "rows": [{"title": "...", "description": "..."}]}

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
targetYes
interactive_typeYes
body_textYes
buttonsNo
header_textNo
footer_textNo
button_textNo
sectionsNo
Behavior4/5

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

With no annotations, the description must disclose behavioral traits. It details the target format, interactive type choices, and constraints like max 3 buttons. It lacks details on permissions, rate limits, or error behavior, but the core behavior is well-described.

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

Conciseness4/5

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

The description is moderately lengthy but well-organized with an 'Args' section. Each sentence adds value, explaining complex nested structures. It could be slightly more concise, but the structure aids readability.

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?

Given the tool has 8 parameters (3 required), no output schema, and complex nested objects, the description covers parameter semantics and structure thoroughly. It lacks return value or error handling information, but it is otherwise complete for invocation.

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

Parameters5/5

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

Schema description coverage is 0%, so the description carries full burden. It provides clear, example-based semantics for each parameter (e.g., target format, interactive_type values, buttons structure). This compensates fully for the missing schema descriptions.

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 clearly states the tool's purpose: 'Send an interactive WhatsApp message with buttons or a list.' This distinguishes it from siblings like send_message, send_file, and send_template by specifying the interactive component type.

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

Usage Guidelines4/5

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

The description explains the two interactive types ('buttons' or 'list') and their respective required parameters, providing clear usage context. However, it does not explicitly state when not to use this tool or mention alternatives.

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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