Submit URL changes through IndexNow

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

The description adds useful behavioral context: it validates the key file, accepts up to 10,000 URLs, and explicitly states 'This does not guarantee crawling or indexing.' However, it does not discuss auth requirements, quota/rate limits, or what happens on partial failure. The destructiveHint=false and openWorldHint=true annotations are consistent and not contradicted.

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 sentences, front-loaded with the primary action, and zero wasted words. The second sentence adds an important expectation-setting caveat about crawling guarantee. Very efficient.

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 batch submission tool, the description covers the key context: key validation, host scoping, URL types, size limit, and the non-guarantee caveat. No output schema exists, so the description doesn't need to explain return format. Slight gap on failure/partial-submission behavior, but this is reasonably complete for the tool's complexity.

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 50%. The description references the site_url concept ('configured host') which aligns with the schema's 'Exact verified site URL returned by bing_list_sites'. The 'urls' parameter is described as 'added, updated, or deleted public URLs' in the description, adding change_type semantics. However, it doesn't detail the url maxLength (4096) or the 10,000 max that the schema already constraints. Baseline 3 is appropriate.

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 states a specific verb+resource: 'Validate the same-host key file and notify IndexNow about up to 10,000 added, updated, or deleted public URLs on the configured host.' It clearly distinguishes from siblings like indexnow_submit_url (single URL) and indexnow_validate_key (key validation only) by specifying the batch nature and URL-type scope.

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 description clearly states when this tool is appropriate (notifying IndexNow about added/updated/deleted URLs on the configured host). It references bing_list_sites as source for site_url. It lacks an explicit 'when not to use' or alternative recommendation (e.g., indexnow_submit_url for single URL), but the sibling distinction is reasonably inferable.

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