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Evolution API MCP Server

by serversmx

evolution_message_send_buttons

Send WhatsApp messages with interactive buttons including title, description, footer, and custom button definitions for user engagement.

Instructions

Send a message with interactive buttons.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
delayNoDelay in milliseconds before sending.
titleYesMessage title.
footerNoFooter text.
numberYesRecipient phone number (digits, country code) or full WhatsApp JID.
quotedNoMessage to quote/reply to.
buttonsYesButton definitions (Evolution button objects, e.g. { type, displayText, id } or url/copy/call variants).
instanceNoWhatsApp instance name. Optional if EVOLUTION_DEFAULT_INSTANCE is configured.
mentionedNoList of JIDs to mention, e.g. ['5215550123@s.whatsapp.net'].
descriptionYesMessage body/description.
mentionsEveryOneNoMention all group participants.
Behavior2/5

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

No annotations were provided, so the description carries the full burden. It only states 'Send a message with interactive buttons' without disclosing behavioral traits such as required connection state, failure modes, or whether it modifies anything beyond sending.

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?

Extremely concise (one sentence) and front-loaded with the action. However, it may be too brief for a tool with 10 parameters and nested objects.

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

Completeness2/5

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

The description is minimal despite no output schema and 10 parameters. It doesn't cover return values, prerequisites (such as instance connection), or examples of button objects. Incomplete for reliable agent use.

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 coverage is 100%, so baseline 3. The description adds no extra meaning beyond the schema; it doesn't explain button format or nesting. The schema already describes parameters adequately.

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 'Send a message with interactive buttons' clearly identifies the verb (send) and specific resource (message with interactive buttons), distinguishing it from sibling send tools like send_text, send_audio, etc.

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?

No guidance on when to use this tool vs alternatives (e.g., send_list that also may have interactive elements). The description implies it's for interactive buttons, but lacks explicit when-to-use or when-not-to-use context.

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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