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

No annotations are provided, so the description carries the full burden. It communicates a read/list behavior and adds a useful sort-order detail ('newest first'), but does not explicitly state read-only behavior, pagination, auth, or response format. For a simple list tool this is partial, not fully transparent.

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 efficient sentence plus a short sort-order clause. Every word contributes meaning, and the core purpose is front-loaded.

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 low-complexity list tool, the description covers the essential purpose, filter, and sort order. It would benefit from explicit usage guidance relative to siblings, but given the simple scope and schema coverage, the remaining gaps are minor.

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 coverage is 100%, so the baseline is 3. The description only adds that NUR filtering is optional; it does not clarify how 'dagen' or 'limit' interact with results beyond what the schema already says.

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 tool lists recently published books, optionally filtered by NUR category, newest first. This scope differentiates it from get_book (single book retrieval) and search_books (general search) without needing to reference them explicitly.

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 purpose implies when to use it (for recent releases), and the optional NUR filter is mentioned. However, no explicit guidance is given about when to prefer this over search_books or get_book, nor any exclusions or alternative routing.

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