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

Annotations already flag this as a destructive, idempotent write, so the safety profile is covered elsewhere. The description adds useful behavioral detail—that setting default_type null clears the configured default page and that default_action is an HTTP fallback—but omits side effects on live traffic, permission requirements, and whether omitted fields are preserved.

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?

The single sentence is dense and front-loads the main purpose, but the parenthetical about root/non-tracking paths and the long enumeration of type/id pairs make it hard to parse in one pass. No wasted words, yet the structure could be broken into a purpose line plus a parameter note.

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 7-parameter destructive mutation with no output schema and low schema coverage, the description leaves important gaps: it doesn't say what happens to unspecified fields, what the valid id sources are (list_landings/list_campaigns/list_whitepages), or what the update returns. It gives more than nothing but falls short of what an agent needs to call it safely.

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 only 29%, so the description has to carry weight: it does explain the pairing of default_type with default_action/default_landing_id/default_campaign_id/default_whitepage_id and the meaning of null. It never addresses the crawlers enum beyond the schema label, nor confirms whether unlisted parameters remain unchanged.

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 uses a specific verb (edit) with a resource (domain) and names the two editable areas: crawler policy and default page behavior at root/non-tracking paths. It is meaningfully distinguished from siblings like create_domain and update_campaign, though it doesn't explicitly name those alternatives.

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 domain-editing context and the note that null clears the default page target, but there is no explicit when-to-use versus when-not guidance or reference to a sibling (e.g., create_domain vs update_domain, or list_domains for discovery).

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