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

Annotations already declare readOnly/idempotent/non-destructive, so the safety bar is low. The description adds real behavioral context beyond them: the output is a zip with assets/, README and metadata.json, it also returns implementation_prompt, and crucially that every variant stops at a draft and never publishes without user confirmation. Missing only things like download-link expiry or rate limits.

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?

Front-loaded with 'Free' and the packaging behavior, and most sentences carry information. Slightly chatty in places ('This is the one for a user who wants the files'), but no sentence is purely filler.

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?

No output schema exists, so the description carries the return-value burden and does so — download link, files, implementation_prompt. Combined with the publishing-safety note, an agent has enough to call and use it, though build_run_id semantics remain unexplained.

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 only 50%: platform has a schema description and enum, but build_run_id is undocumented anywhere. The description compensates well for platform — explaining that WordPress and Webflow steps genuinely differ and to ask when unknown — but adds nothing about build_run_id, which an agent must pass on every call.

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 and resource — packages a finished page as a downloadable zip — and explicitly distinguishes itself from the sibling share_page ('share_page is the one for a user who wants something to look at'). An agent can route correctly without opening either 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?

Explicit when-to-use versus share_page, explicit guidance on when to pass platform and what to do when it is unknown ('Ask if you do not know'), and a note on who executes the resulting steps. Exclusions and alternatives are both covered.

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