developer_diff_json

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

With no annotations provided, the description must fully disclose behavior. It mentions 'structural, nested properties' but does not clarify output format, case sensitivity, handling of identical objects, depth limits, or performance characteristics.

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-formed sentence with no unnecessary words. It could be slightly more informative but earns high marks for efficiency.

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 description is insufficient for complete understanding. It omits output format (e.g., list of changes), behavior for identical objects, error handling, and any limitations. No annotations or output schema exist to fill gaps.

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% (both jsonA and jsonB have descriptions), so the baseline is 3. The description adds minimal value beyond the schema, only reiterating the 'structural, nested' nature without enriching parameter meaning.

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 clearly states the verb 'perform' and the resource 'diff comparison between two JSON objects', and adds specificity with 'structural, nested properties', which effectively distinguishes it from siblings like data_diff_arrays (array diffs) and developer_diff_files (file diffs).

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 provides no guidance on when to use this tool versus alternatives (e.g., data_diff_arrays for arrays, developer_diff_files for files). No context about prerequisites or when not to use it.

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