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

Annotations already declare readOnly=true, idempotent=true, destructive=false, and closed-world, so the safety profile is covered. The description adds the scoring behavior (six weighted criteria summed into a 0-100 score), which is useful, but does not explain how partial answers affect weighting or what the returned score structure looks like.

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 first sentence is well front-loaded and complete. The second sentence is a promotional link to an external 'full version' that does not help an agent invoke the tool, so it does not earn its place even though the overall text is short.

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 annotations covering the safety profile and the schema fully documenting all six required params, the main remaining gap is output interpretation: no output schema exists and the description only says the result is a 0-100 score. For a tool whose entire purpose is producing a graded score, more detail on the result's composition would help.

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% with weights (25/20/15/15/15/10) documented per parameter and all enums enumerated, so the schema carries the parameter burden. The description's mention of 'six weighted criteria' confirms the schema but adds no syntax or interpretation beyond it, making the baseline 3 appropriate.

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 (score) and resource (persuasive strength of testimonials/proof elements) plus the output unit (0-100 credibility score across six weighted criteria). The resource is distinct enough to separate it from siblings like trust_badge_roi_estimator or value_prop_strength_grader, but it never explicitly differentiates itself from them.

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 only says what the tool computes; it gives no when-to-use context, no prerequisites, and no named alternatives for adjacent audits (value_prop_strength_grader, trust_badge_roi_estimator). An agent must infer invocation criteria entirely on its own.

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