discord_member_roles

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

No annotations are present, so the description carries the full burden. It only states that roles are added/removed without disclosing permissions, the dryRun simulation behavior, transactional semantics, or partial-failure handling. The presence of a dryRun parameter in the schema is not mentioned, representing a notable gap.

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, front-loaded sentence with no unnecessary words. Every word adds value, making it appropriately concise and well-structured.

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?

With no annotations, no output schema, and six parameters, the description is too sparse. It omits the dryRun simulation feature, required permissions, and return behavior, making it insufficient for an agent to fully anticipate how the tool behaves in edge cases or what it returns. Like the update_drive example, this is a mutation tool that should provide more context.

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%, so the description must compensate. It adds meaning by clarifying that addRoleIds and removeRoleIds correspond to the 'multiple roles' to add/remove and that guildId/userId identify the member. However, it does not explain dryRun or reason, leaving two parameters without semantic context beyond their names.

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 specific verbs 'Add and remove' with resource 'multiple roles' and target 'guild member', clearly distinguishing this from sibling tools like discord_upsert_role (role definitions) and discord_moderate_member (moderation actions). It precisely conveys the tool's scope and function.

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 implies usage when modifying member role assignments but offers no explicit guidance on when to prefer this tool over alternatives. Unlike the high-scoring example, it does not name sibling tools or state exclusions, so the usage context is only implicit.

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