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

Annotations already cover the safety profile (readOnly, non-destructive, open-world), and the description adds genuinely new behavioral context: a fixed bounded plan, per-fact observation timestamps, and an explicit warning that a screenshot does not prove current indexing or complete coverage. That is useful framing for interpreting and trusting the output — a real value-add beyond structured fields, though it does not cover cost, latency, or failure modes.

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?

Three short sentences, no filler, with the scoping claim front-loaded before the caveats. The only weakness is that the caveats consume most of the space while core purpose and parameters get none.

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?

No output schema exists, and the description never says what the summary contains, what format 'target' should take (bare domain vs full URL), or what ENRICHED adds. For a two-parameter aggregate audit tool with zero schema documentation, the description leaves the agent under-equipped to call it correctly.

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 0%, so the description must carry parameter meaning, and it says nothing about either parameter. Crucially, the BASE vs ENRICHED profile enum — which clearly changes the audit's depth — is left entirely unexplained, forcing the agent to guess at scope and cost implications.

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 first clause, "Website audit summary with explicit observation scope and missing evidence," essentially restates the tool name and title rather than stating what the audit measures (page checks, links, redirects, indexability, etc.). The remaining sentences are caveats about evidence interpretation, not a statement of the operation, so an agent cannot distinguish this from siblings like nexscope_website_page_checks or nexscope_non_indexable_pages.

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?

There is no when-to-use, when-not-to-use, or named alternative anywhere in the text. With dozens of overlapping website/SEO siblings in the toolset, the description provides no routing signal for choosing this aggregate summary over the individual check tools.

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