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

With no annotations, the description carries the burden of disclosing effects, authentication, or data handling, but it only adds the price and a rough characterization of the result. It does not state whether this creates records, performs verification, or requires certain input preparation.

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 text is brief, front-loaded, and free of filler; the cost is stated compactly. However, the economy is achieved by omitting substantive guidance, so it is concise but not sufficiently informative.

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 tool has three parameters, including a required source_urls array, no output schema, and no annotations, yet the description explains none of the invocation semantics or expected return shape. Critical information about how the multi-source agreement is constructed and what the agent receives is entirely absent.

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 0%, and the description does not mention query, source_urls, or expected_fields at all. An agent must infer parameter meaning solely from property names and types, so the description completely fails to compensate for the missing schema documentation.

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 is a noun phrase describing what the bundle contains, not an action an agent can invoke. 'Independent source observations with agreement made explicit' essentially restates the tool's name without a verb like 'retrieve' or 'aggregate,' and it doesn't distinguish this tool from siblings such as source_backed_search or fetch_evidence.

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?

There is no guidance about when to use this tool over sibling evidence tools, nor any prerequisite contexts or exclusions. The only additional detail is the price, which is an economic constraint, not a usage criterion.

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