create_comment

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

Annotations already indicate non-readOnly (write), non-destructive, and non-idempotent. The description reinforces non-idempotency ('Each call creates a new comment') but does not disclose other behavioral traits like permission requirements or character limits.

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?

Extremely concise (two short sentences). Front-loaded with the action. No redundant info, though it could be slightly expanded to cover key details without losing efficiency.

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?

Adequate for a simple creation tool given schema coverage and output schema existence. However, lacks information on failure modes, required permissions, or comment limitations. It meets minimum viability but leaves gaps.

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 covers all parameters with descriptions. The description adds no extra meaning beyond the schema; for example, it doesn't explain how timestamp affects comment placement or that video_id must be a valid Loom video ID.

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 ('Post a comment'), the resource ('on a Loom video'), and adds the nuance that each call creates a new comment, distinguishing it from edit/delete/get siblings.

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 when to use (to add a comment) but offers no exclusion criteria or comparison with siblings like add_comment_reaction or edit_comment. No guidance on prerequisites or error conditions.

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