Discord MCP Extended

discord_reply_to_forum

Reply to Discord forum threads by providing a thread ID and message. Respond directly to existing posts to keep conversations active.

Instructions

Adds a reply to an existing forum post or thread

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": {
      "threadId": "<threadId>",
      "message": "<message>"
    },
    "name": "discord_reply_to_forum"
  }
}

Input Schema

Name	Required	Description	Default
`message`	Yes
`threadId`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

First observedv1.3.4Aug 9, 2026

TDQS

B3.1/5.0

Behavior2/5

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

No annotations are provided, so the description must disclose behavioral traits. It states 'Adds a reply' which indicates a mutation, but it does not clarify authentication requirements, side effects, return values, or behavior for invalid thread IDs. The brief description leaves ambiguity about whether this posts a new message in the thread or uses Discord's reply feature.

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 concise sentence, front-loaded with the verb and object, with no redundant information.

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's simplicity (2 params, no output schema), the description is minimal but lacks essential context such as prerequisites (login, valid thread), return value, and any behavioral nuances. It is not complete enough for an agent to confidently invoke without additional context.

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% and the description does not mention the 'message' or 'threadId' parameters. The parameter names are somewhat self-explanatory, but the description adds no explicit meaning beyond what the schema provides. It fails the requirement to compensate for low schema coverage.

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 uses a specific verb 'Adds' and resource 'reply to an existing forum post or thread', clearly distinguishing it from sibling tools like create_forum_post (creates new) and send (sends to a channel). It unambiguously states the action and target.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use vs alternatives, no prerequisites or exclusions. The description implies usage for replying to existing threads but does not mention alternatives or when not to use.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.