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

With no annotations, the description carries the burden of behavioral disclosure. It usefully notes the 'x402-paid' nature (a cost/authorization signal) and that results are ranked with snippets. However, it does not mention rate limits, error behavior, or confirm read-only semantics, leaving some behavioral aspects undisclosed.

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 two tight sentences, front-loaded with the core action and endpoint. Every word earns its place; there is no filler or repetition of schema 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?

For a simple 2-parameter tool with no output schema, the description gives enough context to call it correctly and interpret the broad result type. It could be more complete about the exact response shape, but 'ranked results with snippets' plus the schema's parameter docs suffice for basic usage.

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%—both query and limit have descriptions. The tool description adds no parameter-specific meaning beyond what the schema already provides, making this baseline appropriate.

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: 'Web search via /v1/research/search' and clarifies the output ('ranked results with snippets'). This clearly distinguishes it from the listed sibling tools, none of which are web search operations.

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 description implies usage—when you need web search results—but provides no explicit when-to-use guidance, exclusions, or alternatives. Since no sibling performs web search, the lack of alternatives is less critical, but the guidance is still only implied rather than stated.

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