reply_to_comment

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

No annotations are provided, so the description carries the full behavioral burden. It says only that a reply is added: nothing about required permissions, whether the reply notifies participants, whether replies are editable/deletable, what happens on a resolved thread, or what the call returns.

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?

Two short sentences, zero waste, with the core action front-loaded and the prerequisite id source immediately after. Nothing could be removed without losing information.

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 small 3-parameter mutation tool this is close to adequate, but with no annotations and no output schema the description leaves live questions unanswered: whether the created reply is returned, and how the tool behaves on a resolved or missing thread.

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 coverage is 100% and the schema itself already explains commentId ('Comment id from read_comments') and workbookId (optional when one workbook is connected). The description adds no meaning beyond the schema, so the baseline 3 applies.

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?

States a specific verb+resource pair ('Add a reply to an existing threaded comment') and uses 'threaded' to distinguish it from the sibling add_comment, which creates a top-level comment. It does not explicitly name which sibling it is not, so it falls short of a 5.

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?

Provides one concrete prerequisite ('Use the comment id from read_comments'), which implies you must read comments first. However, it never states when to reply versus start a new thread with add_comment, nor what to do about resolve_comment or whether replying to a resolved thread is allowed.

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