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

Annotations already cover the safety profile (non-readOnly, non-destructive, idempotent), so the bar is lower; the description still adds real value by disclosing that the previous version is retained in version history (last 10) and restorable, plus that publishing is immediate. It does not mention permissions or size/latency behavior, but the destructive-effect disclosure is the important part.

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, zero filler, and the most important fact (immediate publish) is front-loaded before the recovery caveat.

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 adequately covers the mutation's effect and its reversibility, which is what an agent needs for a two-parameter write tool. Minor gap: no note on auth/permission requirements or what a successful response indicates.

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% (html with a 5 MB cap, site id/name format with list_sites reference), so the schema carries parameter meaning. The description adds nothing beyond what the schema already documents, which is the expected baseline.

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 ('Replaces the site's index.html... and publishes it immediately'), which precisely distinguishes this write path from get_site, list_sites, and restore_version. An agent can tell exactly what the call does 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?

Usage is implied by the atomic 'replace and publish' framing, but the description never states when to prefer this over restore_version or how it relates to create_site. No explicit when-not or alternative routing is given.

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