get_device_categories

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

The description discloses that this is a beta endpoint, which is a useful behavioral trait. However, with no annotations, it carries the burden of explaining side effects or prerequisites. It does not mention read-only nature, permissions, or potential pagination, though these may be inferred from the action.

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, concise sentence that states the essential purpose without any redundancy or wasted 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?

Given the tool's simplicity (zero parameters) and the presence of an output schema, the description is sufficient. It could mention pagination or that it returns a collection, but the output schema likely covers the return structure. The beta endpoint note adds relevant 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?

The tool has zero parameters, and the schema coverage is 100%, so the description does not need to explain parameter meaning. Baseline for zero parameters is 4, and no additional parameter semantics are required.

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 clearly states the action ('List all') and the resource ('Intune device categories'), making it distinct from sibling tools that focus on users, groups, devices, or policies. The '(beta endpoint)' note adds context without ambiguity.

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 the full list of device categories is needed, but it does not explicitly contrast with alternatives or state when not to use it. Since it is a zero-parameter list tool, the intended use is fairly obvious, but there is no explicit guidance.

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