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send16-mcp

send16-mcp

by spruikco
OverviewSchemaSourceRelated ServersDiscussionsAdmin
JavaScript
Hybrid

get_message_events

Retrieve the delivery event timeline for a message, showing status updates without exposing the message body or recipient details.

Instructions

Get just the delivery event timeline for a message — no body or recipient details.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "id": "<id>"
    },
    "name": "get_message_events"
  }
}

Input Schema

NameRequiredDescriptionDefault
idYesMessage ID
apiKeyNoSend16 API key (overrides SEND16_API_KEY env var)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.5.7

TDQS

A3.9/5.0
Behavior3/5

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

No annotations provided, so description bears full burden. It states the tool gets delivery events, but does not disclose what events are included (e.g., sent, delivered, bounced) or any side effects/permissions, leaving some behavioral ambiguity.

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?

Single compact sentence that front-loads the core purpose and adds a clarifying exclusion, with zero wasted words.

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

Completeness3/5

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

No output schema exists, yet description only hints at 'delivery event timeline' without specifying structure (e.g., list of events, timestamps). For a low-complexity tool, this is acceptable but incomplete.

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% for both parameters (id and apiKey), so description adds no extra meaning beyond what the schema already provides. Baseline 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 tool retrieves 'delivery event timeline for a message' and explicitly excludes 'body or recipient details', distinguishing it from get_message and other sibling tools like get_contact_timeline.

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 implies when to use (when only delivery events are needed) by contrasting with get_message, but does not explicitly state when not to use or mention alternative tools.

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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