edit_xlsx

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions add/update operations but does not disclose that outputPath defaults to overwriting the input, that deleteSheet is also supported, or any side effects or return behavior. For a mutation tool, this is a significant transparency gap.

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 one front-loaded, efficient sentence. It states the tool's purpose immediately and then gives representative actions; 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?

The input schema is rich and covers all parameters, so an agent has enough structured information to invoke the tool. However, with no annotations and no output schema, the minimal description leaves gaps around default overwrite behavior, deleteSheet support, and expected results. It is adequate but not complete.

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 the schema already documents all parameters. The description adds only high-level operation names that map to the 'action' enum but does not add meaning beyond what the schema provides. Baseline 3 is appropriate.

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 uses a specific verb ('Edit') and resource ('existing Excel spreadsheet (XLSX)'), and gives concrete action examples: add rows, update cells, add sheets. The word 'existing' distinguishes this from create_xlsx, and the resource distinguishes it from edit_docx and edit_pptx.

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 phrase 'Edit an existing Excel spreadsheet' clearly signals this tool is for modifying existing XLSX files, not creating new ones. It does not explicitly name create_xlsx or other alternatives, so it stops short of a full 5, but the context is clear enough for an agent to select it appropriately.

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