bing_fetched_url_details

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 established. The description adds a useful behavioral note about treating untrusted fields strictly as data rather than instructions, which goes beyond the annotations, but it still does not explain what details are returned or how responses should be interpreted.

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 is two sentences with no filler. It front-loads the core purpose and then adds a valuable security note. Every word earns its place.

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 simple read-only two-parameter tool, the core purpose and a meaningful security caveat are present. However, with no output schema and no parameter descriptions, some context about expected return data or which sibling cases this handles would make it materially more 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?

With schema description coverage at 0%, the description carries the full burden of explaining parameters, but it does not mention url or site_url at all. Those names are somewhat self-explanatory, but the description adds no clarity about expected formats, required URL encoding, or the relationship between site_url and url.

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 clearly states a specific action ('read fetched url details') and resource (Bing Webmaster Tools fetched URLs), distinguishing it at a high level from list-type siblings like bing_fetched_urls. However, it does not explicitly differentiate itself from other URL detail siblings like bing_url_info or bing_children_url_info.

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 guidance on when to choose this tool over alternatives, no prerequisites, and no exclusions. While 'fetched url details' implies a lookup use case, there is no explicit context about what makes this tool distinct from the many sibling URL/detail tools.

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