write_data_to_excel

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

The description discloses that the tool writes 'without any verification,' which is a behavioral trait. However, it lacks details on overwriting behavior, error handling, or performance. With no annotations, more transparency is expected.

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 relatively concise with a clear first sentence. The 'Args:' section is redundant but not verbose. Each sentence adds information without excess.

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 description covers all parameters but lacks context about return values, error conditions, and prerequisites beyond what is implied by parameters. An output schema exists but its content is not considered.

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 beyond the schema: explains session_id as 'from open_workbook', data as 'list of lists with sublists as rows', and start_cell as 'optional, auto-finds appropriate location'. Schema coverage is 0%, so this adds significant value.

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 ('Write data to') and the resource ('Excel worksheet'). It distinguishes from siblings like read_data_from_excel and create_workbook.

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 vs alternatives. The description implies writing data but does not mention prerequisites (e.g., must have an open workbook) or scenarios where other tools are preferred.

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