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

Annotations already declare readOnlyHint, idempotentHint and openWorldHint=false, so the safety profile is covered. The description adds the result row shape and the fetch hand-off, but says nothing about pagination behavior, result limits, or what 'verbose' changes — gaps that matter given no annotations cover them.

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-loaded with the purpose, and the result-shape and next-step hints are packed in without waste. Nothing could be removed without losing information.

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 no output schema, the description usefully sketches the row format, which is a genuine contribution. But limit/offset/verbose remain unexplained in both schema and description, leaving real gaps for a 4-parameter tool.

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 only 25% (query alone is documented), and the description adds no meaning for limit, offset, or verbose. The 'Rows:' clause describes return values rather than parameter behavior, so it does not compensate for the missing parameter documentation.

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 ('Find vibe coding / AI tools') and even previews the result columns, which is unusually concrete. It partially differentiates from siblings by routing detail lookups to fetch(id), though it doesn't distinguish itself from recommend_tools or list_alternatives.

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 single instruction 'Use fetch(id) for details' gives one clear hand-off to a sibling, which is useful routing. However there is no guidance on when to use search versus recommend_tools, list_alternatives, or list_categories, so the agent must infer the selection criteria.

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