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

The annotation already includes destructiveHint:true, so the destructive nature is known. The description adds valuable context that the deletion removes all stored versions, which is a behavioral nuance beyond the annotation. It doesn't mention irreversibility or permissions, but the annotation covers the core destructive trait.

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 concise and front-loaded. The main statement is one sentence, followed by a minimal Args section. Every word contributes value with no redundancy.

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 single-parameter tool with an output schema and clear annotations, the description fully covers purpose, effect, and parameter semantics. The output schema handles return values, so no additional return info is needed. It is complete for its complexity level.

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 schema provides no description for item_id, so the description's Args section ('The item UUID') fills the gap. This is sufficient to understand the parameter format and purpose, though it is minimal.

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's function with a specific verb ('Delete'), a specific resource ('library document'), and important scope ('all of its stored versions'). This distinguishes it from sibling delete tools like delete_alert and delete_library_folder.

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 tool's purpose is evident from the name and description, so an agent can infer when to use it. However, it does not explicitly mention alternative tools or when not to use it. Since there is likely no alternative for deleting a library item, this is acceptable but not top-tier.

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