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Social Publisher MCP

Social Publisher MCP

by winLee1118
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

prepare_post

Validate post content and generate tailored payloads for each target platform, enabling safe dry-run preparation before actual publication.

Instructions

Validate a post and build platform-specific payloads without publishing.

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": {
      "title": "<title>",
      "body": "<body>",
      "platforms": "<platforms>"
    },
    "name": "prepare_post"
  }
}

Input Schema

NameRequiredDescriptionDefault
bodyYes
tagsNo
mediaNo
titleYes
platformsYes
scheduledAtNo

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.5/5.0
Behavior2/5

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

With no annotations provided, the description carries full responsibility for behavioral disclosure. It mentions the tool does not publish, which implies non-destructive operation, but fails to address authentication requirements, side effects, error handling, or what happens to the built payloads. This leaves significant 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?

The description is a single, direct sentence with no filler or redundant information. It front-loads the action and stays concise, making it easy to parse.

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 tool has moderate complexity with six parameters, including a nested media object, and lacks both an output schema and annotations. The description is too sparse to cover return values, error scenarios, or the relationship to publish_post beyond a simple qualifier. This is insufficient for confident invocation.

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

Parameters2/5

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

Schema description coverage is 0%, meaning the description must compensate by explaining parameters. It does not mention title, body, platforms, tags, media, or scheduledAt, leaving the agent to rely entirely on the schema. The description adds no value beyond the schema for parameter understanding.

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 function with specific verbs ('validate', 'build') and a clear resource ('post'). The phrase 'without publishing' explicitly distinguishes it from the sibling publish_post tool, making the purpose unambiguous.

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 the tool is for pre-publication preparation by stating 'without publishing', giving clear context. However, it does not explicitly state when to use it instead of publish_post or mention prerequisites like authentication, so it lacks full guidance.

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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