discord_list_guilds

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

Annotations already declare readOnlyHint and openWorldHint, and the description's "Read-only" simply restates that. It does add the useful membership bound (results are limited to guilds the bot has joined), but says nothing about pagination, ordering, or rate limits. With annotations carrying the safety profile, this is a modest addition rather than rich context.

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?

Three short sentences, front-loaded with the resource and scope, then the call signature, then the routing hint. No filler or redundancy.

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?

An output schema exists, so return-shape detail in the description is unnecessary, and the description still previews the key fields. For a zero-parameter, read-only discovery tool this covers everything an agent needs to call it 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?

The tool takes zero parameters, and the description explicitly confirms "Takes no arguments," matching the empty schema. Nothing further is required for a parameterless tool.

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?

States a specific verb (List) and resource (Discord servers/guilds) with the exact scope: only guilds the bot is a member of. It also names the fields returned (id, name, member count, icon), so an agent can distinguish it from discord_get_guild_info or discord_list_channels without opening a schema.

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?

"Start here to discover the guild_id needed by most other tools" gives a clear entry-point and prerequisite rationale for calling it before anything else. It does not explicitly contrast with the closest sibling (discord_get_guild_info) or state when not to use it, which keeps it below a 5.

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