drive_replies_list

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

Annotations already declare readOnlyHint=true, which the description aligns with ('List' is read-only). However, the description adds no extra behavioral context such as pagination behavior, handling of deleted replies, or whether results are ordered. With annotations present, the bar is lower, but the description still contributes nothing beyond the core action, resulting in a baseline score of 3.

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 front-loads the verb and object. It is efficient with no wasted words. However, it is so brief that it borders on under-specification, though not verbose enough to lose more than one point.

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 has 6 parameters, no output schema, and involves pagination (pageToken, pageSize), the description does not mention listing behavior, pagination, or the structure of results. The schema covers parameter definitions, but an agent would benefit from knowing that this supports pagination and what 'deleted' replies mean. The description is adequate for a basic list operation but lacks contextual details that would aid correct invocation.

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 all 6 parameters are documented in the schema. The description itself does not elaborate on parameter usage or relationships. Since the schema carries the full explanatory load, the description adds no value here, warranting the baseline score of 3.

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 a specific verb and resource: 'List replies to a comment.' This distinguishes it from siblings like drive_replies_get (which fetches a single reply) and drive_comments_list (which lists comments). However, it does not explicitly differentiate itself from related list operations, so it loses a point for not naming alternatives.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention that it requires a fileId and commentId, nor does it contrast with drive_comments_list or drive_replies_get. An agent must infer usage from the schema and tool name, which is insufficient for a tool with 6 parameters.

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