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

Annotations already declare readOnlyHint, openWorldHint, idempotentHint, and destructiveHint. The description adds behavioral context such as the ability to read specific web pages and extract video transcripts, and that it works without a domain. These traits go beyond annotations, though rate limits or return format are not mentioned.

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 concise and well-structured. The first sentence states the core purpose, followed by a list of source categories, then specific capabilities, and ends with a clarifying statement about domain requirement. Every sentence adds value without redundancy.

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?

Given that there is no output schema, the description does not explain return values or format. It also does not clarify the relationship with sibling tools like list_sources (e.g., whether list_sources is needed first). However, for a research tool with good annotations, the description covers the main functionality adequately.

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%, so baseline is 3. The description adds minimal new meaning beyond the schema: it repeats that domain is optional and helps competitor research, and that request is a natural language question. No additional semantic detail is provided.

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 clearly states the tool researches any topic across the open web and lists specific source categories (web search, news, video, etc.). It also mentions reading web pages and extracting transcripts. However, it does not explicitly distinguish itself from sibling tools like list_sources or marketing_data, though the purpose is clear.

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 for general research and competitor analysis but does not provide explicit guidance on when not to use it or alternatives. For example, it does not mention that get_current_date is for dates, list_sources for enumerating sources, or marketing_data for marketing-specific queries.

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