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

Annotations already declare readOnly/idempotent/non-destructive, so the safety profile is covered. The description adds genuine behavioral context the annotations don't: unverifiable checks are reported as skipped and excluded from the score, which tells the agent how to interpret partial results. It does not mention runtime cost or expected result shape, hence not a 5.

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?

Two sentences, zero filler. The action and target are front-loaded, and the skipped-checks caveat follows immediately as the one non-obvious fact.

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 a single documented parameter, full annotation coverage, and an output schema to explain returns, the definition is nearly complete. The only unaddressed gap is that 'ARS 3.3' is unexplained jargon and the audit's likely duration/expense is not signaled.

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?

Only one parameter, and its schema entry already defines it at 100% coverage with an example URL. The description adds no format, scope, or constraint detail beyond the schema, so the 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 ('Execute') and resource ('full ARS 3.3 agent-readiness audit on a target URL') plus the four probe domains. It is clearly a broader, whole-site audit than a surface listing or score lookup, though it never names a sibling to contrast against.

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 word 'full' implies this is the comprehensive option versus narrower siblings like glintbase_discover_surfaces or glintbase_get_score, but the description never states when to choose this over them or any preconditions. Usage is left to inference.

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