json_diff

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 says 'compare' and 'show differences', but does not specify whether the comparison is deep, how key ordering is handled, or what the output format looks like. This is a significant gap for a tool with no output schema.

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, concise sentence that is immediately clear, front-loaded with the action, and contains no unnecessary words.

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 simple tool with no output schema and two string parameters, the description provides a minimally viable high-level understanding. However, it fails to explain what 'differences' means concretely (e.g., list of paths, unified diff, boolean), leaving the agent uncertain about the return value. Given the simplicity, a score of 3 is appropriate.

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 already describes both parameters as 'First JSON string' and 'Second JSON string' (100% coverage). The description adds minimal extra meaning beyond 'JSON objects', so it meets the baseline but does not enhance understanding beyond the schema.

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 'Compare' and the resource 'JSON objects', with an outcome of 'show differences'. It effectively distinguishes this tool from sibling diff_text (which is for text) and format_json (which is for formatting).

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 implies usage for comparing JSON content, but it does not explicitly state when to prefer this tool over alternatives or mention any exclusions. Sibling diff_text exists, but no guidance is provided to differentiate use cases.

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