create_workbook

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

Annotations already declare readOnlyHint=false, destructiveHint=true, idempotentHint=true and openWorldHint=false, so the safety profile is covered structurally. The description adds no behavioral context beyond that: it never explains that an existing file is destroyed unless overwrite is set, nor what the tool returns.

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?

A single tight sentence with the core action front-loaded and the optional modifier trailing. It earns its place, though it is terse enough that there is no room for the routing guidance an agent would benefit from.

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 destructive, file-creating tool with four parameters and no output schema, the description omits critical context: the overwrite risk, what happens on a name collision, and how this differs from create_sheet. Annotations cover safety hints but not the workflow positioning the agent needs.

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 75%, with overwrite and headers semantics already documented in the schema (including bold/frozen formatting for headers). The description only echoes the optional header-row behavior and adds nothing for the undocumented sheet_name parameter, so the baseline 3 applies.

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?

States a specific verb (Create) and resource (.xlsx workbook), which is clearly distinguishable from siblings like create_sheet or write_cell by the resource type. However, it never names or contrasts with those siblings, so an agent must infer the workbook-vs-worksheet boundary itself.

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 when-to-use guidance, no prerequisites, and no mention of the closely related create_sheet sibling, which is the most likely confusion point. The reader must infer that this is the entry point before writing cells or creating sheets.

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