write_excel

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the tool writes data but doesn't mention file overwriting behavior, permissions needed, error handling, or performance characteristics. The return value is vaguely described as 'Confirmation message' without details.

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 efficiently structured with a clear purpose statement followed by organized parameter and return sections. Every sentence earns its place, with no redundant or verbose language. The information is front-loaded and easy to parse.

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 write operation with 4 parameters, no annotations, and no output schema, the description provides adequate basic information but lacks depth. It covers what the tool does and parameter meanings but misses behavioral details like file overwriting, error cases, or format specifics that would help an agent use it correctly.

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 significant value beyond the input schema, which has 0% description coverage. It explains all 4 parameters with brief but meaningful context: 'file_path' as the save location, 'data' as CSV/JSON content, 'sheet_name' for Excel organization, and 'format' specifying input type. This compensates well for the schema's lack of descriptions.

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 verb 'Write' and resource 'data to an Excel file', making the purpose immediately understandable. However, it doesn't explicitly differentiate this tool from sibling tools like 'update_excel' or 'export_chart', which might have overlapping functionality.

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 provides no guidance on when to use this tool versus alternatives like 'update_excel' or 'export_chart'. It doesn't mention prerequisites, use cases, or exclusions, leaving the agent to guess based on tool names alone.

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