get_workbook_metadata

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

Annotations declare readOnlyHint=true, and the description reinforces this with 'Read-only operation.' It adds a minor behavioral detail about a possible lightweight reader for speed, but does not disclose error behavior, file-type limitations, or any other side effects. With annotations already covering the read-only nature, the description adds limited but non-trivial context.

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 well-structured with a one-line summary, Args, Returns, and Notes sections. It is mostly efficient, though there is some redundancy between the opening line and the Returns section both listing sheet names, active sheet, and named ranges.

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 simple read-only metadata tool with one parameter and an output schema, the description covers purpose, parameter, return model, and read-only behavior. It lacks guidance on when to use it relative to sibling tools, but the structure and annotations make it sufficiently complete for correct invocation.

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?

There is only one parameter, and the description's 'Args' section restates what the schema shows ('file_path') with a basic explanation ('Path to the workbook to inspect'). It does not add details about accepted file formats, path handling, size limits, or remote paths. Since schema coverage is low, the description should compensate more but barely meets a minimum viable explanation.

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 starts with a specific verb-resource pair ('Return workbook metadata') and enumerates concrete contents (sheet names, active sheet, dimensions, named ranges). This clearly distinguishes it from siblings like get_sheet_summary (which is sheet-focused) and doc_properties (which likely covers document-level properties).

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 gives no guidance on when to choose this tool over alternatives, nor does it state exclusions or prerequisites. There is no mention of use cases, fallback tools, or contexts where this tool is not appropriate.

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