Create library

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

Annotations already declare readOnlyHint=false, idempotentHint=false, openWorldHint=true and destructiveHint=false, so the mutation/non-idempotent safety profile is covered. The description adds only account scoping ('in the user's ADS account') and nothing about permission needs, duplicate-name handling, or side effects, which is acceptable but thin given annotations carry most of the burden.

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?

Two short sentences with no filler, and the core action is front-loaded before the use-case elaboration. Efficient, though the second sentence is more marketing than specification.

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?

With no output schema, the description could usefully state what a successful creation returns (e.g., a library identifier needed to chain into add_to_library), and it omits any visibility/permission caveats around the 'public' flag. It is adequate for a simple 3-param create but leaves a real chaining gap.

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 100%, so all three parameters (name, public, description) are already documented with defaults and examples. The description adds no parameter-level meaning beyond the schema, which is the baseline-3 case.

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+resource ('Create a new paper library/collection') and scopes it to 'the user's ADS account', which is clearer than the bare title. It implicitly separates from siblings like add_to_library and list_libraries, but never names or contrasts them explicitly, so it stops short of a 5.

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 second sentence ('Useful for organizing papers by topic, project, or reading status') gives an implied usage context, but offers no when-to-use vs alternatives guidance and no prerequisites. It does not clarify the relationship to add_to_library (adding existing papers) versus creating a new container, which is the main ambiguity an agent would face.

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