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exileum

meta-mcp

ig_send_message

Send direct messages to Instagram users who have messaged you within the last 24 hours. Requires the recipient's user ID and message text.

Instructions

Send a DM to a user. Requires 'instagram_business_manage_messages' permission. Can only message users who have messaged you first (24hr window).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
recipient_idYesInstagram-scoped user ID of the recipient
messageYesMessage text to send
Behavior4/5

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

With no annotations provided, the description reveals key behavioral traits: the permission requirement and the 24-hour reply window. This is valuable beyond the input schema, though it could mention potential rate limits or side effects.

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?

The description is only two sentences, directly stating the action and then the key constraints. Every sentence is essential and no redundant information.

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 two simple parameters and no output schema, the description adequately covers the behavioral constraints. An agent has enough information to decide when and how to use this tool correctly.

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?

The input schema already describes both parameters with 100% coverage. The description does not add 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 'Send a DM to a user', specifying the action and resource. This distinguishes it from sibling tools like ig_get_message and ig_get_messages which retrieve messages.

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 provides explicit usage context: requires 'instagram_business_manage_messages' permission and can only message users within a 24-hour window after they messaged you. It does not explicitly mention alternatives but the restriction is clear.

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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