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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint=false, so safety behavior is covered. The description adds value beyond that by disclosing the toolradarData structure and the citableSentence field explicitly meant for quoting with its date, which is a behavior an agent could not infer from annotations. No contradiction with 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 dense sentences, front-loaded with the core action, then the return payload, then the fallback instruction. Every clause carries information; nothing is redundant.

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?

An output schema exists, so return values need not be fully re-explained, and the description still highlights the non-obvious citableSentence field. Combined with the search_tools routing hint, an agent has everything needed to call this 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% for the single 'slug' parameter, so the schema gives no format guidance. The description compensates partially by saying the lookup is 'by slug' and that slugs come from search_tools, but it does not specify slug format or where to find the slug in search results.

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 ('Get full detail for one tool by slug') and then enumerates exactly what comes back: description, pricing, pros/cons, features, score, review synthesis, and toolradarData. This distinguishes it clearly from siblings like get_pricing and get_alternatives, which return narrower slices.

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?

Gives an explicit routing rule: 'Use search_tools first if you do not know the slug.' That is a real when-to-use condition naming the alternative. It stops short of exclusions (e.g., when to prefer get_pricing or compare_tools over this broader call), so not quite a 5.

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