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

Annotations already declare it is a non-read-only, non-destructive mutation, so the description's added value is the slug validation contract: lowercase, URL-safe, unreserved, and unique among active websites in the organization. That uniqueness constraint is real behavioral context an agent cannot get from the schema. It does not say what happens on a uniqueness conflict or whether the rename affects a live published site.

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 with zero filler, and the mutation plus its primary constraint are front-loaded in the first line. Nothing wastes the agent's context.

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, and the description does not say what is returned, what error surfaces on a slug collision, or whether slug omission leaves the existing slug intact. For a small mutation tool this is close to adequate, but the missing websiteId documentation and error behavior leave real gaps.

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 the burden: it does well for 'slug' (full character rules and uniqueness) and reasonably for 'name' (display name), but 'websiteId' — a required parameter — is never mentioned. Partial compensation for a three-parameter tool.

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 ('Updates') plus the exact resources touched ('display name' and 'URL slug'), which is far more precise than the title's generic 'Rename a website'. It does not explicitly distinguish itself from nearby siblings such as websiteDomains_renamePlatformDomain or websiteSourceCode_metadata_edit, so an agent must infer the boundary.

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?

There is no when-to-use / when-not-to-use guidance and no mention of alternatives, even though domain renaming (websiteDomains_renamePlatformDomain) and metadata editing (websiteSourceCode_metadata_edit) are plausible confusions in the sibling list. The conditional 'when supplied' for slug is the only usage signal.

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