discord_reply_dm

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

Annotations already indicate readOnlyHint=false and destructiveHint=false. The description adds that the tool attaches a quoted reply reference, works on any message, and returns the new reply's message ID. However, it does not disclose potential side effects like triggering notifications or rate limits beyond what the schema implied.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is only three sentences, each serving a distinct purpose: stating the action, distinguishing from siblings, and specifying the return value. No unnecessary words.

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

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

For a tool with three straightforward parameters, no output schema, and annotations already provided, the description covers purpose, usage guidelines, return value, and scope completely. An AI agent would have all necessary information to select and invoke the tool correctly.

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

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

Schema description coverage is 100%, with each parameter having a concise description. The tool description does not add new information about parameters beyond context, 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.

Does the description clearly state what the tool does and how it differs from similar tools?

The description explicitly states 'Reply to a specific message in a DM, attaching a quoted reply reference.' It is a specific verb (Reply) on a specific resource (DM message), and distinguishes from discord_send_dm (standalone DM) and edit/delete DM tools.

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

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

The description provides clear context: 'Unlike the edit/delete DM tools, this works on any message in the conversation (the bot's or the user's). Use discord_send_dm for a standalone DM with no reference.' It tells when to use this tool and when to use an alternative, though it does not explicitly state 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.