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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only states that the body is discarded, but does not explain side effects, error handling, response format, or any restrictions. For a validation tool, the absence of such details leaves agents guessing about 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 only two sentences, highly concise and front-loaded with the core action. No filler or redundant text, though it sacrifices substance for brevity.

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 9 parameters, no output schema, and no annotations, the description is severely incomplete. It does not specify which parameter to use, what the response looks like, or how to interpret the validation result. The schema adds confusion rather than clarity, making the tool nearly impossible to use correctly without external knowledge.

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 coverage is 100%, but the description does not clarify which parameter represents the 'body' (likely 'json'), and several parameters (ref, url, city) are irrelevant to JSON validation. The description adds no meaningful guidance, and the schema itself is misleading due to unrelated fields, so a baseline 3 is not warranted.

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 states a specific action ('Check whether a body is valid JSON') with a clear resource, and the tool name confirms the purpose. However, the schema includes 9 unrelated parameters (e.g., ref, url, city) that obscure the actual input, making the purpose less clear than the text alone suggests.

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?

No guidance is given on when to use this tool versus alternatives. The description does not mention exclusions, prerequisites, or conditions that would steer an agent toward or away from this tool compared to siblings like domain-shape or jira-key-shape.

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