create_role

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

No annotations are provided, so the description carries the burden. It discloses that this is a WRITE operation and gated behind an environment variable, which is useful. However, it lacks details about permissions needed, reversibility, or side effects of creating a role. The transparency is partial but not negligible.

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 a single sentence, extremely concise and front-loaded. It conveys the core action and gate without any waste. This is ideally sized for a simple tool.

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?

Although the tool has 5 parameters (2 required) and no schema descriptions, the description provides none of that missing context. The output schema exists, so return value explanation is not needed, but parameter semantics and usage guidance are absent. For a write tool with zero schema coverage, this is incomplete.

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 0%, and the description adds no information about parameters. It does not explain the meaning of guild_id, name, color, hoist, or permissions beyond what the bare schema types show. The description fails to compensate for the lack of schema descriptions.

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 uses a specific verb and resource: 'Create a role in a guild.' This clearly states what the tool does and differentiates it from siblings like edit_role and create_channel. The purpose is unambiguous.

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 mentions the gating environment variable '[WRITE, gated behind DISCORD_MCP_ENABLE_WRITE=1]', which provides some usage context (write operations require this flag). However, it does not explicitly tell when to use this tool versus alternatives like edit_role or list_roles, nor does it list any exclusions.

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