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

Despite annotations already declaring the safety profile, the description adds substantial non-schema context: no credit cost, that it queues real work on the operator's live account, the bring-your-own-key requirement (BING_WEBMASTER_API_KEY), and two concrete failure payloads ('not_configured', 'no_matching_site'). This is exactly the value-add the dimension rewards.

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?

One dense paragraph that leads with the verb and resource, then layers behavior, cost, and error modes. Every clause carries information, though the parenthetical and error enumeration could be trimmed slightly.

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?

With no output schema, the description covers the return semantics (the ok/reason failure shapes) and the cost/auth profile, so an agent has everything needed to invoke and interpret this tool.

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% and both parameters are documented in the schema, including the list_projects pointer for projectId. The description adds no parameter-level detail, 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 ('submits a sitemap/feed URL to Bing for a project's matched site') and explicitly distinguishes itself from the sibling get_bing_site_overview by noting this one queues real mutation work. An agent can tell this apart from submit_bing_content or submit_indexnow without opening a schema.

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 a clear condition for use (submitting a feed for a project's matched site) and contrasts with the read-only sibling. It does not, however, position itself against the other submit_* / set_bing_* siblings, so the agent must infer which submission channel to pick.

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