merge_json

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

With no annotations, the description carries the full burden of behavioral disclosure, but it only mentions cost. It does not state whether the operation is read-only, how it handles invalid inputs, what output format to expect, or any side effects. The word 'merge' is the tool name itself, not an elaboration.

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?

Although the description is short, it wastes its few words on a tautology and a generic category, while omitting essential functionality. The only useful sentence is the cost note; concise writing should still convey purpose and usage.

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 large family of JSON/data siblings, the absence of an output schema, and the lack of annotations, this description is completely inadequate. It does not explain what the tool does, how to invoke it, what to pass, or what to expect in return, making correct selection and use impossible.

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 schema's single 'params' field is described generically as 'Tool parameters as JSON object', which provides no semantic detail. The description adds nothing about expected keys, value types, or structure, failing to compensate for the schema's ambiguity.

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 'merge json' simply restates the tool name, and 'JSON & Data tool' is a generic category that applies to numerous siblings. It fails to specify what 'merge' does, what inputs it expects, or how it differs from other JSON utilities.

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 for when to use this tool over alternatives like process_json, json_path_query, or flatten_json. There is no mention of use cases, prerequisites, or examples, leaving the agent without any contextual direction.

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