get-drive-root-item

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

Annotations already declare readOnlyHint=true and destructiveHint=false. The description redundantly states 'Read-only' but adds no further behavioral context such as authentication requirements, rate limits, or what happens if the drive does not exist. With annotations covering the basic safety profile, the description contributes minimal value.

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 of ten words, which is concise. However, it lacks front-loading of key details beyond the name. While brevity is good, it could be restructured to better convey the purpose and context without adding length.

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 that there is no output schema and six parameters, the description should explain what the root folder represents and what the return object contains. It only says 'The root folder of the drive' without describing structure, pagination, or error cases. With annotations providing read-only assurance, the description still leaves the agent underinformed about the tool's output and usage 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 100%, so the baseline is 3. The tool description does not add any parameter-level information beyond the schema. It neither clarifies nor extends the meaning of parameters like 'select', 'expand', or 'fetchAllPages'. Thus, no extra value is provided.

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 indicates the tool retrieves the root folder of a drive and that it is read-only. The verb is implied but the resource (root folder) is specific. Among siblings like 'get-drive-item' and 'get-drive-delta', the name itself differentiates, though the description does not explicitly distinguish.

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 only states 'Read-only,' which implies no side effects, but it does not provide context on when to use this tool versus alternatives like 'get-drive-item' for specific items or 'get-drive-delta' for changes. No explicit when-to-use or when-not-to-use guidance.

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