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Sys0xdbg

better-discord-mcp

by Sys0xdbg

discord_edit_message

Edit a previously sent message in a Discord channel by providing the channel ID, message ID, and new content.

Instructions

Edit one of your own messages.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
contentYes
channelIdYes
messageIdYes
Behavior2/5

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

No annotations are provided, so the description must fully disclose behavioral traits. It only states the action and ownership, but fails to mention that editing is limited to content (based on input schema), any editing restrictions (e.g., can't edit other users' messages), rate limits, or whether prior messages are required.

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 sentence of five words, extremely concise and front-loaded with the core functionality. Every word serves a purpose without unnecessary detail.

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?

For a simple tool with 3 required parameters and no output schema, the description is minimally complete. It covers the basic action but lacks details on response, errors, prerequisites, or optional fields, which would help a agent use the tool confidently.

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 adds no explanation for the three parameters (channelId, messageId, content). While parameter names are self-explanatory, the description does not compensate for the lack of schema descriptions, leaving ambiguity about required format or constraints.

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 (edit), the resource (message), and the ownership condition (one of your own messages). It effectively distinguishes from sibling tools like discord_delete_message or discord_send_message.

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 that the message must be your own, providing basic usage context. However, it does not explicitly state when to use this tool over alternatives like discord_reply_message or when not to use it.

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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