add_excel_chart

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

No annotations are provided, so the description carries full burden. It says 'Create a chart', implying file modification, but does not disclose side effects (e.g., overwriting existing charts), return values, error handling, or permission requirements. Behavioral transparency is low 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 followed by a parameter list, with no unnecessary words. It front-loads the purpose and organizes the arguments cleanly, making it efficient and easy to scan.

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?

With six parameters and no output schema, the description covers the essential parameter meanings but omits behavioral context such as return value, file modification semantics, and error conditions. It is adequate for basic invocation but lacks depth for an agent to anticipate consequences.

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 0%, so the description must compensate. It provides brief explanations and examples for all six parameters (e.g., chart_type: bar, line, or pie; data_range: 'A1:B10'). This adds meaningful value over the bare schema titles, though it could be more explicit about allowed values or formats.

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 states a specific verb ('Create') and resource ('a chart in an Excel sheet'), clearly distinguishing it from sibling tools like add_excel_formula or write_excel_data. The action and object are unambiguous.

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 implies usage (adding a chart), but does not explicitly state when to use this tool versus alternatives, nor provide prerequisites (e.g., workbook must exist) or exclusions. It is adequate but leaves the when-to-use to inference.

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