Get Device Groups

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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the description adds only conceptual context about device groups, not additional behavioral details like pagination or sorting. This is acceptable given the simple read-only nature, but the description doesn't go beyond the annotations.

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 concise and well-structured, with a clear first sentence stating the action and subsequent sentences providing useful context about device groups. Every sentence contributes to understanding the tool's purpose and domain.

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 zero-parameter, read-only list tool with an output schema and strong annotations, the description is complete. It explains what the tool returns (all device groups) and provides domain context, fully adequate for an agent to select and invoke 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 has zero parameters, and the input schema is empty. The description mentions 'all' device groups, clarifying the unfiltered scope, which is useful. Since no parameters exist, the baseline for semantics is high and this is adequately handled.

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?

Description clearly states 'Get all device groups' with a specific verb and resource, and the context about what device groups are clarifies the object. It distinguishes from sibling tools like create_device_group or add_devices_to_group by focusing on retrieval.

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 usage is implied for listing device groups, but the description provides no explicit guidance on when to use this tool versus alternatives, nor any exclusions. No mention of related tools for creating or modifying groups.

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