append_rows

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

The description explains that rows are appended after the last used row, but does not detail behavior for empty sheets (whether it starts at row 1), what constitutes 'last used row', or any error conditions. With no annotations, more depth would be beneficial, but the basic intent is clear.

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 succinct sentences, first stating purpose, second providing parameter usage. No redundant information, front-loaded with the key action. Every word earns its place.

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 simple append operation with no output schema and no annotations, the description covers the basic functionality. However, it misses details like return value, side effects (e.g., does it modify the sheet in place?), and behavior with empty values or large data.

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?

The description adds meaning to 'values' as 'a list of rows' and explains that omitting sheet uses the active sheet. However, it does not clarify the structure of each row (array of cell values) or constraints. Since schema coverage is 0%, the description adds value but not full detail.

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 tool appends rows after the last used row, using the verb 'append' and specifying the resource 'rows of a sheet'. It compares to 'adding to a table', which distinguishes it from insert or overwrite operations. This is distinct from siblings like insert_rows and write_range.

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 explicit guidance on when to use this tool versus alternatives like write_range or insert_rows. The only usage hint is 'Omit sheet to use the active sheet', which is more about parameter use than context selection. There are no when-not-to-use or prerequisites mentioned.

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