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

The annotations already declare readOnlyHint=false, openWorldHint=true, idempotentHint=false, and destructiveHint=false. The description adds genuinely useful behavior context beyond them: the copy's permanence depends on authentication state, and an anonymous copy carries its own claimToken. It still omits practical details such as whether the source must be live, what happens to the source, or what the call returns, so the behavioral picture is partially but not fully complete.

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 tight sentences are front-loaded with the core action and then a useful conditional clause. There is little waste, though the trailing 'with its own claimToken' is slightly telegraphic and is not explained.

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 tool with four parameters, no schema descriptions, no output schema, and non-read-only semantics, this definition is too thin. It covers the high-level authentication dichotomy but leaves parameter meanings, prerequisites about the source site state, and return behavior unaddressed, so an agent would have to guess how to supply the optional parameters.

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 four parameters and zero schema description coverage, the description needs to carry parameter meaning, but it names none of them. The mention of a 'new link' and 'its own claimToken' hints at the target identity and ownership, yet it never explains sourceSlug versus slug, whether slug is optional, or what ttlSeconds and workspaceId control. This leaves a significant gap at 0% schema coverage.

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 has a specific verb ('Copy') and resource ('a live temporary site to a new link'), which distinguishes it from siblings like claim_site, publish_site, or delete_site. However, it does not explicitly contrast itself with claim_site, the closest sibling, so its differentiation relies partly on prior knowledge of unrelated tool names.

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?

Usage is implied through the description of outcomes: signed in makes the copy permanent; without an account it is temporary with its own claimToken. This provides context for two paths but offers no explicit guidance on when to choose copy_site over alternatives such as claim_site or publish_site.

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