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

Annotations already establish that this is a non-read-only, open-world, non-destructive operation. The description adds useful behavioral context: the shared link tracks who opened it, read depth, time per section, and questions asked; updating via `link` preserves the same URL with new content; and the call returns the link and its settings. It does not discuss permission requirements, rate limits, or detailed side effects beyond annotations.

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 front-loaded with the core purpose and then adds only the distinctions needed for invocation. It is appropriately sized for a tool with 14 parameters, and every sentence contributes useful selection or behavior information.

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?

Given the high schema coverage, nested objects, and absence of an output schema, the description is largely complete for selecting and invoking the tool. It explains content source options, update behavior, and that a link plus settings are returned. It does not mention some access-related parameters, but those are well covered by the schema.

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 high at 86%, so the schema already documents most parameters. The description still adds meaningful guidance by explaining the content-source mapping for Claude artifacts (`html` vs `react`) and that `link` triggers an in-place update. It does not cover parameters such as `access`, `ai_reading`, `allow`, or `expires_in_days`, but the schema handles those.

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 states a specific verb and resource: share/send a document, deck, HTML page, or Claude artifact as a tracked link. It also distinguishes the update behavior from creating a new share by explaining that passing `link` updates an existing link in place. The purpose is clear without opening the schema.

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?

It gives clear usage context by mapping content types to parameters (`html`, `react`, `document`, Markdown, URL) and explains when to pass `link` instead of creating a new link. However, it does not explicitly name competing siblings such as `update_link` or state when not to use this tool.

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