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

No annotations are provided, so the description must carry the behavioral disclosure burden. It does add the cost detail ('$0.20 Base USDC'), but it does not clarify whether the tool fetches public snapshots, whether it is read-only, what it returns, or what side effects occur.

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?

Two short sentences, front-loaded with the core function and followed by the key cost constraint. There is no wasted wording or irrelevant 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?

For a tool that likely needs two snapshot sources and produces a diff report, the description omits input shape, output format, and any usage constraints. The cost disclosure helps, but an agent still cannot confidently invoke the tool based on this definition alone.

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 input schema has a single generic 'input' object with empty properties and additionalProperties allowed, so schema documentation is effectively zero. The description gives only a vague domain clue ('between public OpenAPI snapshots') and does not specify actual input fields, formats, or examples.

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 ('Find') and a precise resource: added, removed, and changed API paths and operations between public OpenAPI snapshots. This clearly distinguishes it from siblings like openapi_health_score or code_diff_summary.

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 states what the tool does but gives no guidance on when to choose it over alternatives, nor does it mention prerequisites or exclusions. Without a reference to sibling tools or edge cases, an agent gets no routing help.

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