bookshelf_get_bookfile

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

The readOnlyHint annotation already declares this as a safe read operation, so the description doesn't need to repeat that. The description adds no extra behavioral details beyond the fetch action, but is consistent with the annotation and sufficient for a simple getter.

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, front-loaded sentence: 'Fetch a single bookfile by id.' It is efficient with no wasted words and directly states the essential action and target.

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 single-parameter get tool with an output schema and read-only annotation, the description is complete. It specifies the input (id) and the action; return values are covered by the output schema, and safety is covered by the annotation.

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?

With zero schema description coverage, the description must compensate for the 'id' parameter. Saying 'by id' clarifies that the parameter is the identifier of the bookfile, though this is only minimally informative given the parameter name and tool name already imply it.

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 'Fetch' and the specific resource 'a single bookfile by id'. This distinguishes it from sibling tools like list_bookfile (multiple bookfiles) and update/delete_bookfile, which are for different operations.

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 when a specific bookfile ID is known and a single result is needed. It provides clear context but does not explicitly mention alternatives or exclusions, such as using list_bookfile to find IDs first.

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