compare_benchmarks

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

Annotations indicate idempotent and non-destructive behavior, but readOnlyHint is false, suggesting potential side effects. The description does not clarify whether the tool writes data or what 'condition and impact checks' entail behaviorally. It adds little beyond the annotations and leaves the side-effect profile unclear.

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 sentence with no redundant wording. It front-loads the core action ('Compare') and is appropriately concise for the information it conveys.

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 the tool has 3 parameters, no schema descriptions, and siblings with overlapping functionality, the description is too sparse. It fails to explain return values (though output schema exists), specify edge cases or prerequisites, or provide any operational context beyond a high-level purpose.

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%, so the description must compensate. The parameter names (baseline_benchmark_id, candidate_benchmark_id, minimum_practical_impact_percent) are somewhat self-explanatory, but the description does not explain the relationship between 'condition and impact checks' and these parameters, nor clarify the meaning of minimum practical impact.

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 'Compare repeated benchmark values with condition and impact checks' clearly identifies the tool's function as comparing benchmark values, distinguishing it from profile comparison. However, the phrases 'repeated benchmark values' and 'condition and impact checks' are somewhat ambiguous and could be more specific.

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 this tool is for comparing benchmark values, but gives no explicit guidance on when to use it instead of sibling tools like compare_profiles or analyze_benchmark. There is no mention of when-not-to-use or alternative tools, leaving the usage context vague.

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