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

Annotations already declare non-readonly, non-destructive, open-world behavior, so the bar is lower. The description still adds genuinely useful context: a daily quota enforced by Bing, the return split between pages sent and those deferred to tomorrow, the founder-approval prerequisite, and that the call is free. It does not describe rate-limit error behavior, but coverage is good.

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-loads the action, then prerequisites and return behavior in a compact run of short sentences. Nothing is wasted, though the fragment style ('Free.') and slightly clipped phrasing make it marginally less smooth than ideal.

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 two-parameter submission tool with no output schema, the description covers prerequisites, quota, approval gate, and the shape of the return value. An agent has enough to call it correctly; only error/retry semantics are unaddressed.

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 100%, so both the urls array and the sitemap URL are already documented in the schema. The description reinforces the sitemap-when-given behavior but adds no format or syntax detail beyond the schema, so baseline 3 applies.

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 (send pages to Bing through its API) and includes the sitemap variant. Easily distinguished from sibling bing_connect, which is an authentication/setup tool rather than a submission tool.

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 explicit preconditions: only after the founder's yes on the list, and bing_connect must be run first. It also frames the quota boundary that governs whether this tool is appropriate. The only small gap is it does not name an alternative submission path, but the sequence with bing_connect is clear.

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