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

Annotations already report readOnlyHint=true, so no safety contradiction exists. The description adds useful behavioral context by saying up to 10 queries can be executed and that results are returned grouped by query. It does not disclose failure behavior, rate limits, or what happens when one query in the batch fails, but the read-only annotation lowers the disclosure burden.

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 sentences: a direct functional statement followed by a concise rationale for batching. It is front-loaded, contains no filler, and every sentence contributes useful 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?

The core invocation is adequately described: up to 10 queries, grouped results, and a clear use case. However, there is no output schema, so the description should carry more weight, and it still leaves `lang`, `category`, and per-batch failure behavior unexplained. This is sufficient for basic use but not complete for all plausible calls.

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%, so the description must compensate for unroun documented parameters. It indirectly describes `queries` via 'up to 10 queries' and 'grouped by query', but it does nothing to explain `lang` or `category` or how they affect results. The required parameter is partially covered, but two optional parameters remain semantically opaque.

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 uses a specific verb plus resource: 'Execute up to 10 queries in one call' and 'returns the results grouped by query.' It clearly differentiates this batch tool from a single search tool by emphasizing batching multiple queries in one round trip.

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 states when to use it: when answering a real question typically requires several related searches. It also explains the cost of doing searches one at a time. It does not explicitly name the alternative tool or state when not to use it, so it is clear but not fully exhaustive.

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