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

Annotations already declare destructiveHint=true, readOnlyHint=false, openWorldHint=true and idempotentHint=false, so the agent knows this is a state-changing submission. The description adds that it submits a Builder task and reuses one tool for five modes, but says nothing about cost, rate limits, or what the submission produces beyond that. No contradiction with the annotations.

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, front-loading the trigger keywords before the actual function statement. The opening trigger-keyword list is heavily redundant and buries the concrete 'submits an Amazon product-detail Builder task' statement in second position.

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 12-parameter, mode-switching tool with no output schema, the description covers the enumeration of modes but does not explain the required spider_id-driven dispatch or how parameters couple to each mode. The 100%-covered input schema compensates substantially, so the description is adequate but not self-sufficient.

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%, so the schema already documents all 12 parameters including the enum and mode mappings. The description names the same five modes as the schema enum, adding no syntax, format, or dependency detail beyond what is structured. Baseline 3 is correct when the schema does the heavy lifting.

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 description states a specific verb+resource: submitting an Amazon product-detail collection (Builder) task, and enumerates the five supported collection modes (by-asin, by-url, by-keywords, by-category-url, by-best-sellers). This lets an agent identify it as the Amazon product scraper, though it never distinguishes it from siblings like amazon_product_list, amazon_global_product, or amazon_seller.

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?

It offers trigger conditions ('when the user needs Amazon product details, ASIN, product URL, keyword search...'), which is implied usage context. However there is no explicit when-to-use-this-vs-alternatives guidance and no exclusions against the many sibling product scrapers.

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