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

Annotations already declare readOnlyHint=false, destructiveHint=false, openWorldHint=true, so safety framing is partly covered. The description usefully adds the one-listing-per-domain constraint and that the new URL replaces the prior page, but says nothing about the required proof-of-ownership step or what happens to the old URL on failure.

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, action first, constraint second — front-loaded and free of padding. The domain-rule sentence is terse to the point of being slightly cryptic, but it is not wasted.

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 three-required-parameter mutation with no output schema and no parameter documentation, the description is thin. An agent still cannot tell what proof means, how ownership is verified, or what the response returns after the URL is changed.

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 0%, so the description must carry all parameter meaning, and it does not. It implies the url parameter but never explains listing_id or the required proof enum (email vs domain), which is the most consequential input to get right.

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?

"Point an existing listing at a new URL" gives a specific verb (point/repoint) and resource (existing listing's URL), which separates it from creation-oriented siblings like submit_listing. It doesn't explicitly name those siblings or state the contrast, so the differentiation is inferential rather than stated.

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 clause "One listing per root domain, so this is how a second page replaces the first" implies when to use it (when a new page should take over from an existing one on the same domain). It gives no explicit exclusions, no mention of when to use refresh_listing/submit_listing instead, and no prerequisites.

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