vendorComparison

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

No annotations are provided, so the description carries the full behavioral burden. It usefully discloses which metrics are compared (success rates, failures, response times), but it does not state whether the operation is read-only, what the output looks like, or any permissions needed. This is acceptable for a comparison tool but not fully transparent.

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, well-structured sentence that front-loads the core action and resource. It contains no filler, repetition, or unnecessary detail.

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 is simple, with only two string parameters and no output schema. The description provides the key context: what is compared, which vendors are involved, and which metrics are covered. It could mention the return format or a time range, but for this low-complexity tool, the level of detail is largely sufficient.

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 the schema already fully documents both parameters. The description adds no extra semantic detail beyond the names and examples, which is fine but does not elevate it above the baseline.

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 uses a specific verb ('Compare') and names the exact resource being compared: performance metrics across two specific vendors. The phrase 'two specific vendors' clearly differentiates it from sibling tools like vendorPerformance, topVendor, and worstVendor.

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 clearly conveys when to use this tool: when comparing performance metrics of exactly two vendors. It does not explicitly mention alternatives or exclusion cases, but the 'two specific vendors' condition is clear enough to guide selection.

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