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

The annotations already declare readOnlyHint, idempotentHint, non-destructive behavior, and openWorldHint=false. The description adds useful context that results are 'real, AI-identified' direct competitors rather than category matches, but it does not describe result freshness, ordering, or limitations beyond that.

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 description is a single tight sentence with the core distinction front-loaded. There is no filler or repetition, and the parenthetical earns its place by narrowing the meaning.

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 explained, and annotations cover the safety profile. However, the description leaves the required slug parameter and the relationship to sibling tools underspecified, so it is only minimally complete for an agent selecting and invoking the 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?

Only the limit parameter has schema description coverage (default 10, max 20). The required slug parameter is undocumented in both schema and description, and the description does not clarify its expected format or whether it is a tool identifier. With 50% schema coverage, the description does not compensate for the gap.

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 and resource: 'Get ... alternatives to a tool.' The parenthetical clarifies that these are direct competitors rather than category matches, which distinguishes it from broad category-oriented siblings, though it does not explicitly name compare_tools or recommend_tools.

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 by the 'direct competitors, not category matches' exclusion, but the description does not explicitly say when to use this tool versus compare_tools, recommend_tools, or search_tools. There is no guidance on limits or when one alternative tool should be preferred.

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