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

Annotations only say readOnlyHint=false / openWorldHint=true / destructiveHint=false; the description adds the important behavior that the quota is checked first and that nothing is submitted on quota_exceeded — atomicity an agent must know about. It also discloses the quota_before/quota_after reporting, though that partly duplicates the output schema.

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?

Front-loaded with the action and quota mechanism, then constraints, then the alternative. The IndexNow digression is longer than strictly necessary but does carry decision-relevant information, so little is 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 2-parameter, open-world write tool with an output schema, the description covers prerequisites, quota behavior, limits, and the fallback path. It stops short of stating what account/permission setup is required (e.g. how the Bing account is linked to the workspace) or what happens to invalid URLs within the batch.

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 0%, so the description must compensate, and it does: it constrains 'urls' (must belong to the workspace website, max 500) and explains 'workspace' (customer workspace slug, optional when only one workspace exists). It does not specify URL format (absolute vs. relative) or duplicate handling, so not a 5.

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 and resource ('URLs bei Bing zur (Neu-)Indexierung einreichen') and immediately qualifies the mechanism (via Bing account, with daily quota). It is clearly distinguishable from bing_submit_sitemap and from site_indexnow_submit, which it names explicitly.

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?

Gives an explicit alternative with the exact condition that selects it: 'Ohne Kontingent und ohne Bing-Konto geht site_indexnow_submit (IndexNow)', including the trade-off (won't appear under 'URL-Übermittlung' in Bing Webmaster Tools). It also states hard preconditions (URLs must belong to the workspace site, max 500).

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