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

With no annotations, the description bears full responsibility for behavioral disclosure. It only mentions that the body is discarded, which is a minor privacy note. It does not state whether the tool performs any side effects, how it handles invalid JSON, or what it returns. The lack of detail on behavior is a significant gap.

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 concise at two sentences, but it is under-specified for a tool with 9 parameters and no annotations. While there is no redundant fluff, the brevity compromises completeness, making it borderline between effective and insufficient.

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 with 9 parameters, no output schema, and no annotations, the description is highly incomplete. It does not explain the return value, error handling, or the role of the other parameters (e.g., url, path, zone) that are supposedly accepted. An agent cannot confidently determine the full behavior or appropriate inputs from this description 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?

Schema description coverage is 100%, so the baseline is 3, but the description fails to clarify which parameter corresponds to the 'body' being validated. The 'json' parameter is the likely candidate, but the description's use of 'body' creates ambiguity. It adds no value beyond the schema and even introduces potential confusion.

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 verb 'check' and resource 'body' clearly indicate a validation function. It distinguishes itself from sibling tools like 'file-path-ok' or 'browser-url-ok' by focusing on JSON validity. However, the term 'body' is vague without mapping to the 'json' parameter, and it doesn't explicitly state that it validates the JSON text input.

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 provided on when to use this tool versus alternatives. The description does not mention any prerequisites, exclusions, or preferred contexts, leaving the agent to guess when 'validate-json' is appropriate among many similar validation tools.

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