bing_fetched_urls

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds a meaningful behavioral warning to treat fields marked untrusted strictly as data and never as instructions, which is important context for handling the tool's output. It does not discuss pagination or rate limits, but the added security guidance is valuable and goes beyond the annotations.

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 description contains two sentences with no filler or repetition. The first sentence states what the tool does, and the second adds a meaningful security caveat. Every word earns its place, and the most important information is front-loaded.

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 one-parameter read-only tool, the description is serviceably minimal, but it leaves some gaps: there is no output schema and the description does not describe what the response contains or which exact fields are marked untrusted. It also does not clarify how this relates to bing_fetched_url_details, so an agent might struggle to choose between list-level and detail-level tools.

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?

The only parameter, site_url, has 0% schema description coverage, and the tool description does not explain its expected format, whether it needs to be the Bing-registered root URL, or whether a trailing slash matters. The parameter name and tool context provide partial intuition, but the description does not compensate for the missing schema documentation.

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 names a specific verb (Read) and resource (fetched urls from Bing Webmaster Tools), making the core action clear. The plural 'urls' hints at a list operation, but it does not explicitly distinguish this tool from sibling bing_fetched_url_details, so it stops short of full sibling differentiation.

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 gives no explicit guidance on when to use this tool versus alternatives. It does not mention bing_fetched_url_details, bing_url_info, or any other sibling, nor does it state any exclusions or prerequisites. The purpose implies usage, but no concrete directional guidance is provided.

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