json_diff

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

With no annotations provided, the description carries the full behavioral burden. It goes beyond the schema by disclosing that comparison is deep, reports added/removed/changed values, and includes paths. It does not cover edge cases like invalid JSON or array ordering, but the core behavioral contract is clearly stated.

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 main content is one efficient, front-loaded sentence that states the operation and output value. The trailing '[PRO - 3 free trials]' is promotional noise rather than functional guidance, preventing a perfect score.

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 there is no output schema, the description sufficiently explains what the agent will receive: differences categorized as added, removed, and changed with paths. It could be more complete by addressing input validity or output formatting, but for a straightforward two-string comparison tool it 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%, with both parameters documented as 'First JSON string' and 'Second JSON string'. The description adds no additional parameter-level detail beyond saying these are JSON objects, so the baseline of 3 is appropriate since the schema already covers 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 uses a specific verb 'Deep-compare' with resource 'two JSON objects' and specifies exactly what is produced: added, removed, and changed values with paths. This clearly differentiates it from siblings like json_query and json_format, which have different purposes.

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 intended use is implied: use this when you need to compare two JSON values and see their differences. However, it does not explicitly state when to prefer this over json_query or provide any exclusions or alternative routing, so the usage guidance is not fully explicit.

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