bookshelf_list_update

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

The readOnlyHint annotation declares the safety profile, but the description adds no additional behavioral context. It does not explain what an 'update' is, what the response contains, or any other operational details, making it inadequate beyond the annotation.

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 under-specified rather than concise. Two words provide no useful information and leave the tool's purpose completely ambiguous, which is not acceptable conciseness.

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?

Even with an output schema and annotation, the description fails to clarify what resource is being listed or whether 'update' is a noun or verb. This ambiguity makes the tool selection and invocation impossible to do reliably.

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 tool has zero parameters in the schema, so there are no parameter details to explain. The baseline of 4 is appropriate since the description does not need to compensate for undocumented parameters.

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 'List update' is essentially a restatement of the tool name and fails to specify what it does. It is ambiguous whether it lists updates or updates a list, and it does not distinguish itself from siblings like 'bookshelf_list_log_file_update'.

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?

There is no guidance on when to use this tool versus alternatives. The description gives no context for when to select it among the many list_* and update_* sibling tools.

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