append_columns_to_sheet

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

With no annotations, the description carries full burden for behavioral disclosure. It states columns are appended empty, but omits details like whether existing data is affected, if there are limits on column count, or if the operation is reversible. This is insufficient for a mutation tool.

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, efficiently conveying the core action. However, given the lack of detail, it is under-specified, which slightly reduces the score. It is concise but not optimally informative.

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 tool with no output schema, no annotations, three required parameters, and many sibling tools, the description is incomplete. It lacks information about parameter types (e.g., sheet name vs ID), the meaning of 'length', and expected return values. This could lead to incorrect use.

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 0%, and the description does not explain any parameter semantics. The parameter names (spreadsheet_id, sheet, length) are not elaborated, leaving ambiguity about expected formats or units. The description adds no value beyond the schema.

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: append empty columns to the end of a sheet. It uses a specific verb (append) and resource (columns to sheet), making it easy to understand what the tool does. Among siblings like insert_columns and delete_columns, this tool is uniquely identified.

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?

No guidance is provided on when to use this tool versus alternatives like insert_columns or other column operations. There is no mention of prerequisites, limitations, or scenarios where this tool should be preferred.

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