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

Annotations already declare this is a non-destructive, idempotent mutation. The description adds genuinely non-obvious semantics beyond them: that a link only proves a server record exists (not identity or usefulness), that idempotency keys should be reused for replay, that secrets/signatures/sensitive task details are prohibited, and that there is no payment effect. Return behavior is not described, but with annotations covering the safety profile this is a strong add.

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?

Six short, dense sentences with the core action front-loaded and constraints trailing in priority order. Every sentence carries distinct information (purpose, optional linking, link caveat, secrecy rule, idempotency, payment). No filler.

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 9-parameter mutation with no output schema and zero schema description coverage, the description covers constraints and link semantics well but omits the meaning of most fields and any statement of what a successful call returns or whether feedback is visible to others. Adequate but with clear gaps given the tool's complexity.

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% across 9 parameters, so the description carries the full burden. It clarifies the reference object's kinds (example/purchase/run) and idempotency-key replay semantics, but leaves product_id, rating, helpful, message, outcome, version, and task_description with no meaning beyond their raw types and patterns.

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 ('Leave bounded self-reported feedback'), which an agent can distinguish from the read-only siblings (get_product, list_products). However, it never contrasts itself with the closest sibling report_outcome, so an agent must infer the feedback-vs-outcome split. Clear purpose, no explicit sibling differentiation.

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?

Usage is implied: leave feedback about a product, optionally linking an example, purchase, or run. The 'No payment effect' note and the optional-link sentence give some context, but there is no explicit when-to-use versus report_outcome or invoke_product, and no stated prerequisites for calling it.

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