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Evolution API MCP Server

by serversmx

evolution_message_send_status

Send a WhatsApp status (story) as text, image, video, or audio. Choose recipients or send to all contacts.

Instructions

Post a WhatsApp status (story): text, image, video, or audio.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
fontNoFont index (text status).
typeYesStatus type.
captionNoCaption (for media).
contentYesText content, or media URL/base64 depending on type.
instanceNoWhatsApp instance name. Optional if EVOLUTION_DEFAULT_INSTANCE is configured.
allContactsNoSend to all contacts.
statusJidListNoSpecific recipient JIDs (when allContacts is false).
backgroundColorNoBackground color (text status), e.g. #008000.
Behavior2/5

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

No annotations are present, so the description must disclose behavior. It only states the basic action without details on authentication, rate limits, mutation impact, or success/failure outcomes. The description adds little beyond the function name.

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 a single, concise sentence that efficiently conveys the core functionality. It is front-loaded and avoids unnecessary words, though more detail could improve clarity without sacrificing conciseness.

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?

Given the tool has 8 parameters and no output schema or annotations, the description is too minimal. It omits key context such as recipient selection (allContacts, statusJidList), instance configuration, and the difference between text and media statuses, leaving the agent underinformed.

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 the schema already describes all 8 parameters. The description does not add any additional meaning beyond the schema, so the baseline score of 3 is appropriate.

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 action ('Post'), the resource ('WhatsApp status (story)'), and the supported content types ('text, image, video, or audio'). This effectively distinguishes it from sibling tools that send direct messages (e.g., evolution_message_send_text) or manage chats.

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?

The description implies the tool is for posting statuses, but it does not explicitly state when to use it versus alternatives like evolution_message_send_media for direct messages. No guidance on prerequisites or when not to use is provided.

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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