map_reduce_mr_zip

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

No annotations are provided, so the description carries the full burden. It states the basic operation but does not disclose important behaviors: what happens if arrays are of unequal length, if inputs are not valid JSON arrays, or if there are any side effects. Minimal transparency.

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, focused sentence that immediately conveys the tool's purpose. Every word is meaningful, with no filler or redundancy.

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 covers the core function but omits important contextual details such as handling of mismatched array lengths or input validation. Since an output schema exists, return values are assumed to be defined, but the description could be more complete given the tool's simplicity.

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?

Despite 0% schema coverage, the parameter names ('left' and 'right') are self-explanatory. The description adds no additional meaning beyond what the schema indicates. The baseline of 3 is appropriate as the schema already conveys the intended inputs.

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 specifies the action ('zip'), the resource type ('two JSON arrays'), and the output format ('[{left, right}, ...] pairs'). This effectively distinguishes it from sibling tools like 'map_reduce_mr_filter' or 'map_reduce_mr_map'.

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 when to use (when you need to pair elements of two arrays), but it does not provide explicit guidance on when not to use, prerequisites (e.g., arrays must be JSON arrays), or mention alternative tools. Usage context is implied but incomplete.

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