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

Goes beyond annotations by stating the key-file verification step and the immediacy/irreversibility of submission. Annotations already flag destructiveHint=true and non-idempotent, but the description adds concrete operational context (key verification, immediate dispatch) that the agent needs before calling.

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?

Three tight sentences, no waste. Front-loads the action, then a prerequisite, then the irreversibility warning, then a related-tool pointer.

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?

Output schema exists, so return values needn't be explained. The description covers purpose, prerequisite verification, and an irreversibility caveat. A minor gap is the lack of any usage condition vs alternatives, but for a narrowly-scoped mutation tool this is close to complete.

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 100%, so both parameters are fully documented in the schema. The description adds no parameter-level detail beyond tying siteId implicitly to list_sites.

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 (submits/notifies) and resource (URLs to IndexNow search engines) scoped to a site. No sibling tool does the same thing, and the IndexNow reference is unambiguous.

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?

Implies usage ('Notifies IndexNow of URLs on one of your sites') but gives no explicit when-to-use vs alternatives. The 'Related: list_sites' hint provides a prerequisite link, which helps select the right siteId, but there's no exclusion or condition guidance.

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