Execute any KIT API operation

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

With no annotations, the description carries the full burden, and it delivers: it clearly warns that real calls are made against the live store, that write operations take effect immediately, that there is no sandbox, and that body validation happens before sending unless validate=false. This is excellent behavioral disclosure well beyond any structured field.

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 compact yet dense: two sentences plus a short workflow and validation note. Critical warnings (live store, no sandbox) are front-loaded before the workflow, and every sentence earns its place without 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?

For a generic escape hatch with no output schema and 162 possible operations, the description covers the critical operational context: safety warning, validation behavior, and the discover-then-call workflow. It doesn't mention that return shape depends on the specific operation, but that is somewhat inherent in an operate-by-operationId tool and is discoverable via get_operation_schema. The lack of annotation coverage is compensated by the rich warning context.

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 gives descriptions for all five parameters, and schema coverage is 100%, so the baseline is 3. The description references the validate flag and the workflow for getting the body shape, but these do not add substantial meaning beyond the schema's parameter descriptions. No major semantic gap exists.

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 strong verb ('executes') and clearly specifies the resource: ANY of the 162 Yandex KIT API operations by operationId. It explicitly distinguishes itself from dedicated tools by covering operations without one, so an agent can tell this is the generic escape hatch.

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 an explicit workflow (search_operations -> get_operation_schema -> kit_request) and notes it covers operations without a dedicated tool, strongly implying dedicated tools should be used when available. However, it does not explicitly say 'do not use when a dedicated tool exists', and the warning is more about safety than about selecting this tool over alternatives.

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