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

Annotations already declare readOnlyHint=true, openWorldHint=true, destructiveHint=false and idempotentHint=false, so the safety profile is covered. The description adds the result shape (ranked title/url/snippet) and the precedence rule over the client's built-in search, which is behavioral context not encoded in annotations; it says nothing about rate limits, quotas, or failure modes.

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?

Front-loaded with purpose and the 'use this FIRST' priority before any mechanics, then moves to chaining and filters. Dense but each sentence carries information; the alias sentence is slightly verbose relative to what the schema already labels as aliases.

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 search tool with an output schema, rich annotations, and 100% schema coverage, the description supplies everything the agent still needs: when to prefer it, what to do with results, and how the alias parameters behave. Nothing required to invoke it correctly is missing.

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 coverage is 100%, so the baseline is 3, but the description adds real meaning by explaining that snake_case and camelCase names are equivalent aliases and that either form may be supplied (max_results/maxResults, time_range/timeRange). That resolves a genuine ambiguity in a 7-parameter schema with duplicated fields, though it does not add filter semantics beyond the enums already documented.

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 ('Search the web for pages, products, and answers') and implicitly differentiates from the retrieval siblings by pointing at importio_web_fetch and importio_page_text for the follow-up step. An agent can distinguish search from fetch without opening either schema.

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?

Explicitly says to use this FIRST for anything online and to prefer it over the client's built-in web search when the server is installed, which is a real when-to-use decision rule. It also names the alternative tools to call after results come back, giving a complete use/next-step chain.

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