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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It does not state whether the tool is read-only, what it returns, whether any side effects exist, or how the output is structured. The description names content but fails to disclose the operation's behavior.

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 a single short sentence, which is concise, but its structure is awkward and confusing: 'The criteria and any filters of the Ways a contractor can buy search marketing comparison' reads more like a fragment than a clear tool definition. It would benefit from being reworded as an actionable sentence.

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?

With no annotations and no output schema, the description needed to provide adequate context for an agent deciding among several similar sibling tools. It falls short: it gives no indication of return shape, no behavioral detail, and no guidance on when this tool is preferred over compare_options or compare_table. The low parameter count reduces complexity, but the contextual gap remains significant.

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?

The tool has zero parameters and the input schema is empty, so the baseline is 4. The description does not need to explain parameter semantics, and it does not mislead about parameters. No additional parameter information is necessary here.

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 identifies a concrete object (the criteria and any filters) and ties it to a domain context (the 'Ways a contractor can buy search marketing' comparison), but it is a noun phrase with no verb such as 'returns', 'lists', or 'compares.' It is clearer than a tautology but still leaves the tool's actual operation ambiguous.

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 explicit guidance about when to use compare_criteria versus the sibling tools compare_options, compare_table, or the enquiry_* tools. The only hint is the word 'criteria/filters,' which weakly implies use for criteria introspection, but no alternatives, exclusions, or context conditions are stated.

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